Articles de revues : « Cardiomyopathy, GLS »

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Stronati, Giulia, Lucia Manfredi, Alessia Ferrarini, Lucia Zuliani, Marco Fogante, Nicolò Schicchi, Alessandro Capucci et al. « Subclinical progression of systemic sclerosis-related cardiomyopathy ». European Journal of Preventive Cardiology 27, n^o 17 (19 avril 2020) : 1876–86. http://dx.doi.org/10.1177/2047487320916591.

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Aims Cardiac involvement in patients with systemic sclerosis (SSc) is frequent and represents a negative prognostic factor. Recent studies have described subclinical heart involvement of both the right ventricle (RV) and left ventricle (LV) via speckle-tracking-derived global longitudinal strain (GLS). It is currently unknown if SSc-related cardiomyopathy progresses through time. Our aim was to assess the progression of subclinical cardiac involvement in patients with SSc via speckle-tracking-derived GLS. Methods This was a prospective longitudinal study enrolling 72 consecutive patients with a diagnosis of SSc and no structural heart disease nor pulmonary hypertension. A standard echocardiographic exam and GLS calculations were performed at baseline and at follow-up. Results Traditional echocardiographic parameters did not differ from baseline to 20-month follow-up. LV GLS, despite being already impaired at baseline, worsened significantly during follow-up (from –19.8 ± 3.5% to –18.7 ± 3.5%, p = .034). RV GLS impairment progressed through the follow-up period (from –20.9 ± 6.1% to –18.7 ± 5.4%, p = .013). The impairment was more pronounced for the endocardial layers of both LV (from –22.5 ± 3.9% to –21.4 ± 3.9%, p = .041) and RV (–24.2 ± 6.2% to –20.6 ± 5.9%, p = .001). A 1% worsening in RV GLS was associated with an 18% increased risk of all-cause death or major cardiovascular event ( p = .03) and with a 55% increased risk of pulmonary hypertension ( p = .043). Conclusion SSC-related cardiomyopathy progresses over time and can be detected by speckle-tracking GLS. The highest progression towards reduced deformation was registered for the endocardial layers, which supports the hypothesis that microvascular dysfunction is the main determinant of heart involvement in SSc patients and starts well before overt pulmonary hypertension.

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Bottinor, Wendy, Justin Godown, Gary Coburn, Jonathan Soslow et Scott C. Borinstein. « Implementing strain imaging to identify early childhood cancer survivors at risk for cardiovascular disease. » Journal of Clinical Oncology 37, n^o 15_suppl (20 mai 2019) : e23070-e23070. http://dx.doi.org/10.1200/jco.2019.37.15_suppl.e23070.

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e23070 Background: In patients receiving active chemotherapy, myocardial strain has prognostic utility for risk of subsequent cardiomyopathy. We hypothesized a decrement in strain in early off-treatment childhood cancer survivors (CCS) is prognostic for developing cardiomyopathy. Methods: Retrospective analysis was performed in 22 CCS. Global longitudinal strain (GLS) and global circumferential strain (GCS) were assessed at baseline and on the first end-of-treatment study with adequate imaging quality. Parametric methods assessed the association between changes in GLS/GCS and cardiovascular outcomes. Results: All CCS had normal echocardiograms at baseline and on the first end-of-treatment study . On long-term follow up 5/22 developed echocardiographic abnormalities defined as either left ventricular ejection fraction < 55% (n = 4) and/or left ventricular mass Z score < -2.0 (n = 4). Mean age at diagnosis was (mean ± SEM) 13.0 ± 1.3 and 10.7 ± 1.2, p = 0.37 for those without and with long-term abnormalities respectively. Patients who developed long-term echocardiographic abnormalities had a greater decrement in GCS between baseline and fist end-of-treatment echocardiograms (-6.9 ± 0.9% vs -0.7 ± 1.2%, p = 0.011) and a trend towards greater decrement in GLS (-1.5 ± 1.3% vs 1.2 ± 0.7%, p = 0.069). In early off-therapy CCS an absolute change in GCS of 7% was associated with subsequent cardiovascular dysfunction within 10 years. Conclusions: Change in GCS of 7% or greater from baseline to first end-of-treatment echocardiogram may identify CCS at risk for cardiomyopathy on long-term follow up and offer a window for early intervention. Strain imaging may provide an early method of identifying CCS at higher risk for developing cardiomyopathy on long-term follow up. These survivors may benefit from increased surveillance or early intervention with cardioprotective therapies.

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Małek, Łukasz A., Łukasz Mazurkiewicz, Mikołaj Marszałek, Marzena Barczuk-Falęcka, Jenny E. Simon, Jacek Grzybowski, Barbara Miłosz-Wieczorek, Marek Postuła et Magdalena Marczak. « Deformation Parameters of the Heart in Endurance Athletes and in Patients with Dilated Cardiomyopathy—A Cardiac Magnetic Resonance Study ». Diagnostics 11, n^o 2 (22 février 2021) : 374. http://dx.doi.org/10.3390/diagnostics11020374.

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A better understanding of the left ventricle (LV) and right ventricle (RV) functioning would help with the differentiation between athlete’s heart and dilated cardiomyopathy (DCM). We aimed to analyse deformation parameters in endurance athletes relative to patients with DCM using cardiac magnetic resonance feature tracking (CMR-FT). The study included males of a similar age: 22 ultramarathon runners, 22 patients with DCM and 21 sedentary healthy controls (41 ± 9 years). The analysed parameters were peak LV global longitudinal, circumferential and radial strains (GLS, GCS and GRS, respectively); peak LV torsion; peak RV GLS. The peak LV GLS was similar in controls and athletes, but lower in DCM (p < 0.0001). Peak LV GCS and GRS decreased from controls to DCM (both p < 0.0001). The best value for differentiation between DCM and other groups was found for the LV ejection fraction (area under the curve (AUC) = 0.990, p = 0.0001, with 90.9% sensitivity and 100% specificity for ≤53%) and the peak LV GRS diastolic rate (AUC = 0.987, p = 0.0001, with 100% sensitivity and 88.4% specificity for >−1.27 s−1). The peak LV GRS diastolic rate was the only independent predictor of DCM (p = 0.003). Distinctive deformation patterns that were typical for each of the analysed groups existed and can help to differentiate between athlete’s heart, a nonathletic heart and a dilated cardiomyopathy.

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Golukhova, E. Z., N. I. Bulaeva, D. V. Mrikaev, S. A. Alexandrova et B. Sh Berdibekov. « Prognostic value of left ventricular global longitudinal strain and mechanical dispersion by speckle tracking echocardiography in patients with ischemic and nonischemic cardiomyopathy : a systematic review and meta-analysis ». Russian Journal of Cardiology 27, n^o 3S (14 septembre 2022) : 5034. http://dx.doi.org/10.15829/1560-4071-2022-5034.

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Aim. To conduct a systematic review and meta-analysis in order to evaluate the prognostic value of left ventricular global longitudinal strain (LV GLS) and LV mechanical dispersion (LVMD) in ischemic and nonischemic cardiomyopathy.Material and methods. We searched PubMed, Google Scholar and Embase for studies on the prognostic value of LV GLS and LVMD in ischemic and nonischemic cardiomyopathy. Hazard ratios (HR) from included studies were pooled for metaanalysis.Results. Twelve studies were selected from 314 publications for this systematic review and meta-analysis. In total, 2624 patients (mean age, 57,3 years; mean follow-up, 40,8 months) were included in the analysis. Meta-analysis showed that decreased LV GLS was associated with an increased risk of ventricular arrhythmias (VAs) (adjusted HR: 1,10 per 1% of GLS; 95% CI: 1,01-1,19; p=0,03) and major adverse cardiovascular events (MACE): adjusted HR: 1,22 per 1% of GLS; 95% CI: 1,11-1,33; p<0,0001). Patients with VAs had greater LVMD than those without it (weighted mean difference, 33,69 ms; 95% CI: -41,32 to -26,05; p<0,0001). Each 10 ms increment of LVMD was significantly and independently associated with VA episodes (adjusted HR: 1,18; 95% CI: 1,08-1,29; p=0,0002).Conclusions. LV GLS and LVMD assessed using speckle tracking provides important predictive value and can be used as an effective tool for stratifying risk in patients with ischemic and nonischemic cardiomyopathy.

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Golukhova, E. Z., S. A. Alexandrova, N. I. Bulaeva, D. V. Mrikaev, O. I. Gromova et B. Sh Berdibekov. « Prognostic value of myocardial strain by magnetic resonance imaging in nonischemic dilated cardiomyopathy : a systematic review and meta-analysis ». Kardiologiia 62, n^o 10 (30 octobre 2022) : 35–41. http://dx.doi.org/10.18087/cardio.2022.10.n2034.

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Aim This study was aimed at performing a systematic review and meta-analysis to investigate the prognostic role of left ventricular (LV) myocardial strain variables as determined by magnetic-resonance imaging in non-ischemic dilated cardiomyopathy.Material and methods A search was performed in PubMed (MEDLINE), Google Scholar, and EMBASE databases for studies on the prognostic role of LV myocardial strain based on MR feature-tracking in non-ischemic dilated cardiomyopathy. Uncorrected odds ratio (OR) values reported by the studies where similar evaluation criteria of myocardial strain were available, were combined for a meta-analysis.Results Nine studies were selected from 351 publications for this systematic review and meta-analysis. The analysis included a totality of 2139 patients (mean age, 52.3 years; mean follow-up duration, 42.5 months). The meta-analysis showed that the worsening of the LV global longitudinal strain (GLS), global circumferential strain (GCS), and global radial strain (GRS) was associated with increased risk of major adverse cardiovascular events (MACE): OR, 1.13 per each % of GLS; 95 % CI: 1.050–1.225; p=0.001; OR, 1.16 per each % of GCS; 95 % CI: 1.107–1.213; p<0.0001; OR, 0.95 per each % of GRS; 95 % CI: 0.92–0.97; p<0.0001.Conclusion The LV GLS, GCS, and GRS variables by MR feature-tracking data are powerful predictors for the development of MACE. Evaluation of myocardial strain can be used as an effective instrument for risk stratification in patients with non-ischemic dilated cardiomyopathy.

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Keranov, Stanislav, Saskia Haen, Julia Vietheer, Wiebke Rutsatz, Jan-Sebastian Wolter, Steffen D. Kriechbaum, Beatrice von Jeinsen et al. « Application and Validation of the Tricuspid Annular Plane Systolic Excursion/Systolic Pulmonary Artery Pressure Ratio in Patients with Ischemic and Non-Ischemic Cardiomyopathy ». Diagnostics 11, n^o 12 (24 novembre 2021) : 2188. http://dx.doi.org/10.3390/diagnostics11122188.

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The main aim of this study was to assess the prognostic utility of TAPSE/PASP as an echocardiographic parameter of maladaptive RV remodeling in cardiomyopathy patients using cardiac magnetic resonance (CMR) imaging. Furthermore, we sought to compare TAPSE/PASP to TAPSE. The association of the echocardiographic parameters TAPSE/PASP and TAPSE with CMR parameters of RV and LV remodeling was evaluated in 111 patients with ischemic and non-ischemic cardiomyopathy and cut-off values for maladaptive RV remodeling were defined. In a second step, the prognostic value of TAPSE/PASP and its cut-off value were analyzed regarding mortality in a validation cohort consisting of 221 patients with ischemic and non-ischemic cardiomyopathy. A low TAPSE/PASP (<0.38 mm/mmHg) and TAPSE (<16 mm) were associated with a lower RVEF and a long-axis RV global longitudinal strain (GLS) as well as higher RVESVI, RVEDVI and NT-proBNP. A low TAPSE/PASP, but not TAPSE, was associated with a lower LVEF and long-axis LV GLS, and a higher LVESVI, LVEDVI and T1 relaxation time at the interventricular septum and the RV insertion points. Furthermore, in the validation cohort, low TAPSE/PASP was associated with a higher mortality and TAPSE/PASP was an independent predictor of mortality. TAPSE/PASP is a predictor of maladaptive RV and LV remodeling associated with poor outcomes in cardiomyopathy patients.

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Trivedi, Siddharth J., Timothy Campbell, Luke D. Stefani, Liza Thomas et Saurabh Kumar. « Strain by speckle tracking echocardiography correlates with electroanatomic scar location and burden in ischaemic cardiomyopathy ». European Heart Journal - Cardiovascular Imaging 22, n^o 8 (15 février 2021) : 855–65. http://dx.doi.org/10.1093/ehjci/jeab021.

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Abstract Aims Ventricular tachycardia (VT) in ischaemic cardiomyopathy (ICM) originates from scar, identified as low-voltage areas with invasive high-density electroanatomic mapping (EAM). Abnormal myocardial deformation on speckle tracking strain echocardiography can non-invasively identify scar. We examined if regional and global longitudinal strain (GLS) can localize and quantify low-voltage scar identified with high-density EAM. Methods and results We recruited 60 patients, 40 ICM patients undergoing VT ablation and 20 patients undergoing ablation for other arrhythmias as controls. All patients underwent an echocardiogram prior to high-density left ventricular (LV) EAM. Endocardial bipolar and unipolar scar location and percentage were correlated with regional and multilayer GLS. Controls had normal GLS and normal bipolar and unipolar voltages. There was a strong correlation between endocardial and mid-myocardial longitudinal strain and endocardial bipolar scar percentage for all 17 LV segments (r = 0.76–0.87, P < 0.001) in ICM patients. Additionally, indices of myocardial contraction heterogeneity, myocardial dispersion (MD), and delta contraction duration (DCD) correlated with bipolar scar percentage. Endocardial and mid-myocardial GLS correlated with total LV bipolar scar percentage (r = 0.83; 0.82, P < 0.001 respectively), whereas epicardial GLS correlated with epicardial bipolar scar percentage (r = 0.78, P < 0.001). Endocardial GLS −9.3% or worse had 93% sensitivity and 82% specificity for predicting endocardial bipolar scar >46% of LV surface area. Conclusions Multilayer strain analysis demonstrated good linear correlations with low-voltage scar by invasive EAM. Validation studies are needed to establish the utility of strain as a non-invasive tool for quantifying scar location and burden, thereby facilitating mapping and ablation of VT.

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Obaid, Najjat, Samir El Hadidy, Mahmoud El Badry et Hassan Khaled. « The Outcome of Diabetic Patients with Cardiomyopathy in Critical Care Unit : Hospital and Short-Term Outcome in a Period of Six Months to One Year ». Open Access Macedonian Journal of Medical Sciences 7, n^o 17 (12 août 2019) : 2796–801. http://dx.doi.org/10.3889/oamjms.2019.655.

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BACKGROUND: Diabetes mellitus (DM) is a major risk factor for heart failure (HF) and coronary artery disease (CAD). DM may cause structural changes involving the left ventricle (LV) systolic and diastolic function. AIM: To compare patients who have diabetes and ischemic cardiomyopathy (ICM) to those with diabetic cardiomyopathy (DMCMP) regarding LV systolic function, diastolic function, in hospital long term and short-term mortality. METHODS: Ninety diabetic patients with heart failure and left ventricular ejection fraction (LVEF) ≤ 35%, admitted to Critical Care Medicine department Cairo University were divided into two groups based on coronary angiography results; group I (ICM) n = 48 patients and group II (DMCMP) n = 42 patients. RESULTS: Group I patients had higher mean age (63 ± 7 years), (p = 0.004), Hypertension (p ˂ 0.001) and dyslipidemia (p = 0.008) were significantly more present in group I compared to group II. No significant differences were found regarding LVEF, global longitudinal strain (GLS), E/A and E/É ratio in both groups. A significant difference in the wall motion score index (WMSI) in group I; (1.4 ± 0.4) versus group II; (1.1 ± 0.2), (p = 0.005) was found. In the study, 6 patients had a cardiogenic shock with no documented in-hospital mortality. At 6 months, statistically, significantly higher mortality rates were found in group I, (p = 0.006), while at one year there was no significant difference in the mortality between the two groups, (p = 0.077). In comparison of the survived and non-survived patients at 6 months and one year in group I (ICM) there was a significant difference in LVEF (40 ± 6% vs 23 ± 6%, p ˂ 0.001), GLS (- 8.1 ± 2.4 vs - 4.6 ± 2.6, p = 0.007), E/A (1.25 ± 0.91 vs 1.8 ± 0.5, p = 0.038), E/É (11.68 ± 7.5 vs 21.3 ± 3.6, p = 0.001) respectively. In group ll (DMCMP) there was no documented mortality at 6 months follow up, however, at one year there was statistically significant difference in the mortality between survived and non-survived patients; the LVEF (35 ± 8% vs 25 ± 2%, p = 0.014), GLS (-7.9 ± 2.9% vs -5 ± 0.1%, p = 0.032), E/A (1.45 ± 0.8 vs 3.3 ± 0, p = 0.006) respectively. The E/É ratio in group ll was not significantly different between the groups (15.73 ± 5.3 vs 15 ± 1, p = 0.873). CONCLUSION: The combination of cardiomyopathy and diabetes affects LV systolic and diastolic function; however; ischemic cardiomyopathy and diabetic cardiomyopathy had a similar systolic and diastolic function. Ischemic cardiomyopathy is associated with worse prognosis compared to diabetic cardiomyopathy.

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Huang, Taiyuan, Schurr Patrick, Louisa Katharina Mayer, Björn Müller-Edenborn, Martin Eichenlaub, Martin Allgeier, Jürgen Allgeier et al. « Echocardiographic and Electrocardiographic Determinants of Atrial Cardiomyopathy Identify Patients with Atrial Fibrillation at Risk for Left Atrial Thrombogenesis ». Journal of Clinical Medicine 11, n^o 5 (28 février 2022) : 1332. http://dx.doi.org/10.3390/jcm11051332.

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Objective: Atrial cardiomyopathy (ACM) is associated with development of AF, left atrial (LA) thrombogenesis, and stroke. Diagnosis of ACM is feasible using both echocardiographic LA strain imaging and measurement of the amplified p-wave duration (APWD) in digital 12-lead-ECG. We sought to determine the thresholds of LA global longitudinal strain (LA-GLS) and APWD that identify patients with AF at risk for LA appendage (LAA) thrombogenesis. Methods: One hundred and twenty-eight patients with a history of AF were included. Left atrial appendage maximal flow velocity (LAA-Vel, in TEE), LA-GLS (TTE), and APWD (digital 12-lead-ECG) were measured in all patients. ROC analysis was performed for each method to determine the thresholds for LA-GLS and the APWD, enabling diagnosis of patients with LAA-thrombus. Results: Significant differences in LA-GLS were found during both rhythms (SR and AF) between the thrombus group and control group: LA-GLS in SR: 14.3 ± 7.4% vs. 24.6 ± 9.0%, p < 0.001 and in AF: 11.4 ± 4.2% vs. 16.1 ± 5.0%, p = 0.045. ROC analysis revealed a threshold of 17.45% for the entire cohort (AUC 0.82, sensitivity: 84.6%, specificity: 63.6%, Negative Predictive Value (NPV): 94.3%) with additional rhythm-specific thresholds: 19.1% in SR and 13.9% in AF, and a threshold of 165 ms for APWD (AUC 0.90, sensitivity: 88.5%, specificity: 75.5%, NPV: 96.2%) as optimal discriminators of LAA-thrombus. Moreover, both LA-GLS and APWD correlated well with the established contractile LA-parameter LAA-Vel in TEE (r = 0.39, p < 0.001 and r = −0.39, p < 0.001, respectively). Conclusion: LA-GLS and APWD are valuable diagnostic predictors of left atrial thrombogenesis in patients with AF.

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Komissarova, S. M., O. V. Krasko, N. M. Rineyskaya et A. A. Efimova. « Predictive value of global longitudinal strain and geometry of left ventricle in patients with noncompaction cardiomyopathy ». Russian Journal of Cardiology 26, n^o 11 (25 août 2021) : 4622. http://dx.doi.org/10.15829/1560-4071-2021-4622.

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Aim. To assess the prognostic role of a decrease in longitudinal strain and an increase in the left ventricular sphericity index as predictors of NYHA class III heart failure (HF) progression, requiring hospitalization in a cohort of patients with noncompaction cardiomyopathy (NCM) in combination with dilated cardiomyopathy (DCM).Material and methods. We examined 90 patients with a combination of NCM and DCM aged 18 to 72 years (median age, 41 years; men — 73; women — 17), who, in addition to conventional echocardiographic and magnetic resonance imaging (MRI) characteristics, were studied for two-dimensional strain and global longitudinal strain (GLS) parameters and left ventricular sphericity index (SI) using cardiac MRI. The endpoints included NYHA class III HF progression, requiring hospitalization.Results. During the follow-up period (median follow-up, 36 (6; 152) months) in 59 of 90 (65,5%) patients with NCM in combination with DCM, symptoms progressed to NYHA class III HF, requiring hospitalization. Multivariate analysis showed following independent risk factors for HF-related hospitalization: a decrease in GLS <10% (hazard ratio (HR), 5,1; 95% confidence interval (CI), 1,6-16,7, p<0,007) and an increase in SI >0,5 (HR, 9,0; 95% CI, 2,2-37,8, p<0,003) .The 3-year event-free survival rate for patients with one risk factor (GLS, %<10 and SI <0,5; GLS, %>10 and SI >0,5) was 79,2±16,9% and 64,4±24,6%, respectively, while for the group with two risk factors (GLS, %<10 and SI>0,5) — 12,3%.Conclusion. Global longitudinal strain characteristics according to 2D Strain echocardiography and SI according to cardiac MRI are associated with adverse events in NCM and DCM combination and can be used to identify patients with a high risk of HF progression to NYHA class III, requiring hospitalization.

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Ma'ayeh, Marwan, Jeremy A. Slivnick, Monique E. McKiever, Zachary D. Garrett, Woobeen Lim, Michael Cackovic, Kara M. Rood et Elisa A. Bradley. « Imaging-Based Risk Stratification for Recurrence Risk in Women with a History of Peripartum Cardiomyopathy ». American Journal of Perinatology 39, n^o 03 (2 décembre 2021) : 225–31. http://dx.doi.org/10.1055/s-0041-1740016.

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Objective Peripartum cardiomyopathy (PPCM) affects 1:1,000 U.S. pregnancies, and while many recover from the disease, the risk of recurrence in subsequent pregnancy (SSP) is high. This study aims to evaluate the utility of left ventricular ejection fraction (LVEF) and global longitudinal strain (GLS) to predict the risk of recurrence of PPCM in SSP. Study Design We retrospectively evaluated outcomes in women with a history of PPCM and SSP at a large-volume cardioobstetrics program (2008–2019). Results There were 18 women who had incident PPCM and pursued SSP. Of 24 pregnancies in these women, 8 (33%) were complicated by the development of recurrent PPCM. LVEF ≥ 52% or GLS ≤ −16 was associated with a low risk of recurrent PPCM. Conclusion Approximately one-third of women with PPCM developed recurrent PPCM in SSP. LVEF and GLS on prepregnancy echocardiography may predict the risk of recurrence. Additional studies evaluating risk for recurrence are required to better understand which women are the safest to consider SSP. Key Points

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Urtado, Sophie, Hélène Hergault, Stephen Binsse, Vincent Aidan, Mounir Ouadahi, Catherine Szymanski, Sophie Mallet et al. « Usefulness of Longitudinal Strain Adjusted to Regional Thickness in Hypertrophic Cardiomyopathy ». Journal of Clinical Medicine 11, n^o 8 (8 avril 2022) : 2089. http://dx.doi.org/10.3390/jcm11082089.

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Background. We assessed the usefulness of a longitudinal strain adjusted to regional thickness in hypertrophic cardiomyopathy (HCM). Indeed, with conventional software, the width of the region of interest (ROI) is the same over the entire myocardial wall, wherein the software analyzes only partially the left ventricular (LV) hypertrophic segments. Methods. We included 110 patients: 55 patients with HCM (HCM group) and 55 healthy subjects (age- and sex-matched control group). The global longitudinal strain (GLS) and regional strain for each of the 17 segments was calculated with standard software (for two groups) and with software adjusted to the myocardial wall thickness (for the HCM group). Results. GLS was significantly decreased in the HCM group compared to the control group (−15.1 ± 4.8% versus −20.5 ± 4.3%, p < 0.0001). In the HCM group, GLS (standard method versus adjusted to thickness) measurements were not significantly different (p = 0.34). Interestingly, the regional strain adjusted to thickness was significantly lower than the standard strain in the hypertrophic segments, especially in the basal inferoseptal segment (p = 0.0002), median inferoseptal segment (p < 0.001) and median anteroseptal segment (p = 0.02). The strain adjusted to thickness was still significantly lower in the most hypertrophic segments (≥20 mm) (−3.7 ± 3%, versus −5.9 ± 4.4%, p = 0.049 in the basal inferoseptal segment and −5.7 ± 3.5% versus −8.3 ± 4.5%, p = 0.0007 in the median inferoseptal segment). In the segments with significant myocardial fibrosis, the longitudinal strain adjusted to thickness was significantly lower than the conventional strain (−8.3 ± 3.3% versus −11.4 ± 4.5%, p = 0.002). The analysis of the strain adjusted to thickness had a better feasibility (97.5% versus 99%, p = 0.01). Conclusions. The analysis of a longitudinal strain adjusted to regional thickness is feasible in HCM and allows a better evaluation of myocardial deformation, especially in the most LV hypertrophic segments.

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Zhang, Hongju, Yan Sun, Xiaoran Liu, Ya Yang, Tao Sun, Chayakrit Krittanawong, Edward A. El-Am, Guowen Liu, Jiao Yang et Ning Ma. « Speckle tracking echocardiography in early detection of myocardial injury in a rat model with stress cardiomyopathy ». Medical Ultrasonography 21, n^o 4 (24 novembre 2019) : 441. http://dx.doi.org/10.11152/mu-1988.

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Aim: Studies on the usefulness of speckle tracking echocardiography (STE) in the evaluation of the left ventricle in rats with stress cardiomyopathy (SCM) are limited. Our aim was to investigate whether strain values by STE and cardiac troponin I (cTnI) could predict early myocardial injury in rats with SCM.Material and methods: SCM was induced in Sprague-Dawley female rats using immobilization (IMO) stress. Biomarkers and echocardiographic parameters were evaluated and compared among groups (group 1 - 30 minutes after IMO stress, group 2 - 24 hours after IMO stress, and control group). We defined myocardial injury as a left ventricular ejection fraction <50%. Possible predictors of early myocardial injury were determined by univariate logistic regression, and independent predictors of early myocardial injury were investigated with multivariable logistic regression.Results: A total of 44 rats with a mean weight of 426±33 g were evaluated. Group 1 had the highest plasma epinephrine and norepinephrine levels (p<0.001) and the highest heart rate (p<0.001). In univariate logistic regression, cTnI (OR=2.61 [1.02‒10.25], p=0.043) and global longitudinal strain (GLS) (OR=2.13 [1.12‒6.26], p=0.022) were predictive of early myocardial injury. When GLS and cTnI were included in a multivariate analysis, only GLS remained an independent predictor of early myocardial injury (OR=2.67 [1.14‒14.76], p=0.027).Conclusions: STE is useful for the quantitative detection of subtle myocardial abnormalities in rats with SCM. GLS may provide a reliable and non-invasive method to predict early myocardial injury.

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Mėlinytė-Ankudavičė, Karolina, Paulius Bučius, Vaida Mizarienė, Tomas Lapinskas, Gintarė Šakalytė, Jurgita Plisienė et Renaldas Jurkevičius. « Association of Whole-Heart Myocardial Mechanics by Transthoracic Echocardiography with Presence of Late Gadolinium Enhancement by CMR in Non-Ischemic Dilated Cardiomyopathy ». Journal of Clinical Medicine 11, n^o 22 (8 novembre 2022) : 6607. http://dx.doi.org/10.3390/jcm11226607.

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Background: In patients with non-ischemic dilated cardiomyopathy (NIDCM), myocardial fibrosis (MF) is related to adverse cardiovascular outcomes. The purpose of this study was to evaluate the potential relationship between the myocardial mechanics of different chambers of the heart and the presence of MF and to determine the accuracy of the whole-heart myocardial strain parameters to predict MF in patients with NIDCM. Methods: We studied 101 patients (64% male; 50 ± 11 years) with a first-time diagnosis of NIDCM who were referred for a clinical cardiovascular magnetic resonance (CMR) and speckle tracking 2D echocardiography examination. We analyzed MF by late gadolinium enhancement (LGE), and the whole-heart myocardial mechanics were assessed by speckle tracking. The presence of MF was related to worse strain parameters in both ventricles and atria. The strongest correlations were found between MF and left ventricle (LV) global longitudinal strain (GLS) (r = −0.586, p < 0.001), global circumferential strain (GCS) (r = −0.609, p < 0.001), LV ejection fraction (LVEF) (r = 0.662, p < 0.001), and left atrial strain during the reservoir phase (LASr) (r = 0.588, p < 0.001). However, the binary logistic regression analysis revealed that only LV GLS, GCS, and LASr were independently associated with the presence of MF (area under the curves of 0.84, 0.85, and 0.64, respectively). None of the echocardiographic parameters correlated with fibrosis localization. Conclusions: In NIDCM patients, MF is correlated with reduced mechanical parameters in both ventricles and atria. LV GLS, LASr, and LV GCS are the most accurate 2D echocardiography predictive factors for the presence of MF.

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Mornoş, Cristian, et Lucian Petrescu. « Early detection of anthracycline-mediated cardiotoxicity : the value of considering both global longitudinal left ventricular strain and twist ». Canadian Journal of Physiology and Pharmacology 91, n^o 8 (août 2013) : 601–7. http://dx.doi.org/10.1139/cjpp-2012-0398.

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Anthracyclines are important anticancer drugs, but their use is limited by cardiotoxicity. Left ventricular ejection fraction (LVEF) is often inadequate to detect myocardial disease induced by chemotherapy. Tissue Doppler and bidimensional-strain imaging could detect LV myocardial dysfunction earlier than LVEF. In drug-induced cardiotoxicity, torsional and longitudinal LV deformations [LV twist (LVtw), radial strain (GRS), global longitudinal strain (GLS)] are damaged. We assessed whether a new index, GLS×LVtw, could predict future anthracycline-induced cardiomyopathy. Echocardiography, troponin, and natriuretic peptide determination were prospectively performed in 74 patients before and after 6, 12, 24, and 52 weeks of anthracycline treatment. These patients were treated for breast cancer, Hodgkin’s or non-Hodgkin’s lymphoma, acute lymphoblastic or myeloblastic leukaemia, or osteosarcoma. At 6 weeks after initiation of chemotherapy, isovolumic relaxation time, systolic mitral annular velocity, LVGLS, LVGRS, LV apical rotation, LVtw, and GLS×LVtw deteriorated, and troponin levels became elevated (all p < 0.05 by ANOVA) before LVEF decreased. The receiver operating characteristic curves identified early deterioration of GLS×LVtw as the best predictor of later cardiotoxicity (area under curve = 0.93), followed by GLS (0.84) and LV apical rotation (0.81) deterioration. In conclusion, early change in the GLS×LVtw index seems to be a good predictor of future development of anthracycline-induced cardiotoxicity.

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Lu, Dai-Yin, Wei-Ming Huang, Wei-Ting Wang, Sheng-Che Hung, Shih-Hsien Sung, Chen-Huan Chen, Yu-Jou Yang, Dau-Ming Niu et Wen-Chung Yu. « Reduced global longitudinal strain as a marker for early detection of Fabry cardiomyopathy ». European Heart Journal - Cardiovascular Imaging 23, n^o 4 (23 octobre 2021) : 487–95. http://dx.doi.org/10.1093/ehjci/jeab214.

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Abstract Aims Fabry cardiomyopathy (FC) is characterized by progressive left ventricular hypertrophy (LVH). Conventional echocardiography is not sensitive in detecting preclinical FC before the development of LVH. We aim to investigate whether myocardial deformation analysis is useful to detect preclinical FC before LVH. Methods and results One hundred and sixty patients carrying mutated gene were prospectively enrolled, including 86 patients without LVH and 74 patients with LVH. Another 33 healthy individuals were also included for comparison. Standard transthoracic two-dimensional, Doppler, tissue Doppler echocardiography and deformation analysis were performed. The mean age of the overall 193 subjects was 48 ± 15 years, with 51% men. Fabry patients with LVH were older, more often to be men. They also had the worst diastolic function as evidenced by the largest left atrium, lowest E/A, and highest E/e′ ratio. The global longitudinal strain (GLS) deteriorated with the development of LVH (control vs. LVH− patients vs. LVH+ patients = −21.2 ± 2.7 vs. −19.0 ± 2.9 vs. −16.5 ± 4.2%, P < 0.001). Despite similar LV systolic, diastolic function, and LV mass, LVH− Fabry patients still had a reduced GLS as well as regional longitudinal strains at mid-to-apical, anterior, and inferolateral wall when compared to healthy subjects. The basal longitudinal strain was consistently worse in male patients than in female patients, irrespective of LVH. Conclusion Reduced GLS could be a marker of early FC before the development of LVH.

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Kinova, Elena, Desislava Somleva-Todorova et Assen Goudev. « Left Ventricular Strain and Rotation in Patients with Dilated Cardiomyopathy and Severe Systolic Dysfunction ». Cardiology 145, n^o 1 (12 novembre 2019) : 1–12. http://dx.doi.org/10.1159/000503682.

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Introduction: In dilated cardiomyopathy (DCM) left ventricular (LV) strain and twist are significantly decreased. However, the rate of attenuation has not been investigated well in patients with varying degrees of systolic dysfunction. Aim: The present study aimed to investigate the relationship between LV deformational and rotational mechanics and conventional and tissue Doppler imaging (TDI) parameters, and to search for a constellation of findings distinguishing patients with severe systolic dysfunction (SSD) in DCM. Methods: Fifty-two patients with heart failure NYHA class III–IV and ejection fraction (EF) ≤45% were prospectively enrolled (mean age 61.8 ± 13.4 years; 36 males, 69%). Severe systolic LV dysfunction was considered as EF <30%. Echocardiography with 2D-speckle tracking analysis was performed. Results: The relationships of global longitudinal strain (GLS) with EF, circumferential strain at mid-level (CSmid), and systolic medial mitral annulus velocity were strong (r = –0.53, 0.67, and –0.56, respectively, p < 0.0001 for all). A good correlation was found between CSmid and EF (r = –0.50, p < 0.0001). There were weak correlations between basal endocardial rotation (BRendo) and EF and CSmid. Multiple regression analysis found GLS (p < 0.0001) and BRendo (p = 0.04) to be predictors of the change of EF. In ROC curve analysis, the cut-off values of GLS –7.2% (AUC 0.81, p < 0.0001), CSmid –7.5% (AUC 0.76, p = 0.002), and BRendo –2.43° (AUC 0.68, p = 0.03) identified SSD. Conclusions: Parameters of LV mechanics were related to conventional and TDI systolic parameters in patients with DCM. The degree of alterations of LV longitudinal and circumferential deformation and basal rotation may identify patients with SSD and a higher risk, and may help in therapeutic decision making.

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Luo, Xiang-hong, Rui Zhu, Qian Chen, Pei-hong Shi et Li-sha Na. « Early Diagnosis of Abnormal Left Ventricular Systolic Functions of Rare Pathogenic Titin Mutation Gene Carriers in FHCM by Three-Dimensional Speckle Tracking Echocardiography Combined with Gene Detection ». International Journal of Clinical Practice 2022 (11 octobre 2022) : 1–11. http://dx.doi.org/10.1155/2022/3415545.

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Objective. This study aimed to explore the early diagnosis of abnormal left ventricular systolic function of rare pathogenic titin (TTN) mutation gene carriers in familial hypertrophic cardiomyopathy (FHCM) by three-dimensional speckle tracking echocardiography (3D-STE) combined with gene detection. Methods. Eighteen members of a Hui nationality family in Ningxia province of China were enrolled in this study in July 2019. The proband was tested with high-throughput sequencing of gene detection technology to detect the whole exome, and the mutation locus of pathogenic TTN gene was analyzed. According to the result, 16 subjects were divided into two groups: carrier group (n = 4) and noncarrier group (n = 12). Related indicators from 2DE were obtained, and myocardial strain indicators from 3D-STE were analyzed by postprocessing software of Tomtec. Strain indicators included global longitudinal strain (GLS), global circumference strain (GCS), global radial strain (GRS), regional longitudinal strain (RLS), regional circumference strain (RCS), and regional radial strain (RRS). All those indicators were compared between the two groups, and a receiver operating characteristic (ROC) curve was used for further analysis. Results. There were 4 subjects diagnosed as asymptomatic TTN gene carriers with the mutation locus of Val135643Ile. Compared with the noncarrier group, GLS and partial RLS were significantly reduced in the carrier group. The ROC curve shows that GLS has the largest AUC, and its sensitivity was better than LVPWD and specificity was better than IVSD and LVMI obtained from 2DE in the carrier group. Conclusions. There were 4 subjects diagnosed as asymptomatic TTN gene carriers with the mutation locus of Val135643Ile, and their GLS and partial RLS were significantly reduced; GLS had the better sensitivity and specificity than LVPWD, IVSD, and LVMI.

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Capotosto, Lidia, Gabriella D’Ettorre, Camilla Ajassa, Nelson Cavallari, Maria Rosaria Ciardi, Giuseppe Placanica, Serafino Ricci et al. « Assessment of Biventricular Function by Three-Dimensional Speckle Tracking Echocardiography in Adolescents and Young Adults with Human Immunodeficiency Virus Infection : A Pilot Study ». Cardiology 144, n^o 3-4 (2019) : 101–11. http://dx.doi.org/10.1159/000503140.

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Background: The purpose of the study was to assess biventricular parameters of wall deformation with three-dimensional speckle tracking echocardiography (3DSTE) in adolescents and young adults with human immunodeficiency virus (HIV) infection on antiretroviral therapy in order to detect a possible subclinical myocardial dysfunction. Methods: Twenty-one patients aged 12–39 years with HIV, 21 normal controls of the same age and sex, and 21 patients with idiopathic nonischemic dilated cardiomyopathy (DCM) were studied with 3DSTE. All HIV patients were stable in terms of HIV infection, with no history of heart disease or other chronic systemic disease except HIV infection, and were on highly active antiretroviral therapy with good immunological control. Standard echocardiographic measures of left ventricular (LV)-right ventricular (RV) function were assessed. 3D LV global longitudinal strain (GLS), circumferential strain, radial strain, and LV twist were calculated. Global area strain (GAS) was calculated by 3DSTE as percentage variation in surface area defined by the longitudinal and circumferential strain vectors. 3D RV global and free-wall longitudinal strain (FWLS) were obtained. Results: LV GLS and GAS were lower in HIV patients compared to normal controls (p = 0.002, and p = 0.01, respectively). There were no significant differences in LV ejection fractions between the groups. There was a weak positive correlation between LV GLS and age (r = 0.215, p = 0.034) and a weak negative correlation between LV GLS and nadir-CD4 T-cells count (r = 0.198, p = 0.043). DCM patients had more marked and widespread reduction in LV GLS and GAS compared to controls (p < 0.001), whereas in HIV patients LV strain impairment (p < 0.05) was more localized in basal and apical regions. RV FWLS was significantly reduced in HIV patients when compared with the control group (p = 0.03). No patient had pulmonary systolic pressure higher than 35 mm Hg. Conclusions: 3DSTE may help to identify HIV patients at high cardiovascular risk allowing early detection of biventricular dysfunction in the presence of normal LV ejection fraction and in the absence of pulmonary hypertension. LV strain impairment in HIV patients is less prominent and widespread compared to DCM patients.

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Parashar, N., M. Sinha, S. Sharma et S. Ramakrishnan. « Left ventricular involvement in arrhythmogenic right ventricular cardiomyopathy ». European Heart Journal 41, Supplement_2 (1 novembre 2020). http://dx.doi.org/10.1093/ehjci/ehaa946.0729.

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Abstract Background Arrhythmogenic right ventricular cardiomyopathy (ARVC) is not an isolated RV disease. Left ventricular (LV) or biventricular involvement is being increasingly diagnosed in such patients. There is available research to show that the LV peak strain calculated from feature tracking (FT) cardiac MRI is impaired even before the impairment of function. If present, such involvement is an adverse prognostic marker. Purpose The aim of this study is to calculate LV involvement in patients with ARVC using FT cardiac MRI. Methods 27 patients of ARVC who underwent cardiac MRI with late gadolinium enhancement (LGE) in our department were identified. 10 healthy volunteers (controls) were also assessed using non-contrast cardiac MRI. LV strain analysis was performed using Cvi42 Circle cardiovascular imaging software; and global LV peak radial, circumferential and longitudinal strain values were calculated. Patients were divided into two sub groups: those with preserved LV ejection fraction (LVEF) and those with reduced LVEF. Peak LV strain values were compared between the two groups of ARVC patients; and between ARVC patients with preserved LVEF and healthy volunteers. Results The LV peak global longitudinal strain (GLS), global circumferential strain (GCS) and global radial strain (GRS) were −17.7±2.47, −18.16±2.65, 31.04±6.07 respectively in healthy volunteers. LV global longitudinal (GLS), circumferential (GCS), and radial strain (GRS) were significantly impaired in ARVC/D patients (GLS: −11.97±4.34%, GCS: −14.35±4.32%, GRS: 22.1±7.39%). ARVC patients were divided into 2 subgroups: the preserved LV ejection fraction (LVEF) group (LVEF ≥55%, n=9) and the reduced LVEF group (LVEF <55%, n=18). In ARVC patients with reduced LVEF, the peak GLS was −9.99±3.94, GCS was −12.88±4.08 and GRS was 19.57±7.56. With preserved LVEF these values were −15.1±3.02, −17.3±3.3 and 27.1±3.67 respectively. In ARVC patients with preserved LVEF, the peak LV strain were impaired when compared with healthy volunteers with significant difference in peak GLS in between the two groups (p=0.05). Conclusion In patients with ARVC, cardiac MRI feature tracking can detect early LV dysfunction and thus adverse prognostic marker. Even in patients with normal LVEF, GLS was found to be significantly impaired as compared to healthy controls. Calculation of longitudinal strain Funding Acknowledgement Type of funding source: None

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Cavus, Ersin, Kai Muellerleile, Samuel Schellert, Jan Schneider, Enver Tahir, Celeste Chevalier, Charlotte Jahnke et al. « CMR feature tracking strain patterns and their association with circulating cardiac biomarkers in patients with hypertrophic cardiomyopathy ». Clinical Research in Cardiology, 29 mars 2021. http://dx.doi.org/10.1007/s00392-021-01848-5.

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Abstract Aims CMR feature tracking strain (CMR-FT) provides prognostic information. However, there is a paucity of data in hypertrophic cardiomyopathy (HCM). We sought to analyze global CMR-FT parameters in all four cardiac chambers and to assess associations with NT-proBNP and cardiac troponin T (hsTnT) in patients with HCM. Methods This retrospective study included 144 HCM patients and 16 healthy controls with CMR at 1.5 T. Analyses were performed on standard steady-state free precession cine (SSFP) CMR data using a commercially available software. Global left ventricular (LV) strain was assessed as longitudinal (LVLAX-GLS), circumferential (LVLAX-GCS) and radial strain (LVLAX-GRS) on long -axis (LAX) and as LVSAX-GCS and LVSAX-GRS on short- axis (SAX). Right ventricular (RV-GLS), left atrial (LA-GLS) and right atrial (RA-GLS) strain were assessed on LAX. Results We found LVLAX-GLS [− 18.9 (− 22.0, − 16.0), − 23.5 (− 25.5, − 22.0) %, p = 0.0001), LVSAX-GRS [86.8 (65.9–115.5), 119.6 (91.3–143.7) %, p = 0.001] and LALAX-GLS [LA2CH-GLS 29.2 (19.1–37.7), LA2CH-GLS 38.2 (34.3–47.1) %, p = 0.0036; LA4CH-GLS 22.4 (14.6–30.7) vs. LA4CH-GLS 33.4 (28.4–37.3) %, p = 0.0033] to be impaired in HCM compared to healthy controls despite normal LVEF. Furthermore, LV and LA strain parameters were impaired in HCM with elevated NT-proBNP and/or hsTnT, despite preserved LVEF compared to HCM with normal biomarker levels. There was a moderate correlation of LV and LA CMR-FT with levels of NT-proBNP and hsTnT. Conclusion CMR-FT reveals LV and LA dysfunction in HCM despite normal LVEF. The association between impaired LV strain and elevated NT-proBNP and hsTnT indicates a link between unapparent functional abnormalities and disease severity in HCM. Graphic abstract Typical CMR-FT findings in patients with hypertrophic cardiomyopathy

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Aguiar Rosa, S., L. Branco, B. Thomas, A. Fiarresga, L. Lopes, A. Galrinho, M. Selas et al. « Association between microvascular dysfunction and impaired myocardial deformation in hypertrophic cardiomyopathy ». European Heart Journal - Cardiovascular Imaging 22, Supplement_1 (1 janvier 2021). http://dx.doi.org/10.1093/ehjci/jeaa356.388.

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Abstract Funding Acknowledgements Type of funding sources: None. Objective To analyze the relationship between coronary microvascular dysfunction (MCD) and left ventricular (LV) myocardial deformation in hypertrophic cardiomyopathy (HCM). Methods Prospectively inclusion of HCM patients (P). MCD was assessed by CMR, during regadenoson-induced hyperemia. For perfusion assessment, the myocardium was divided into 32 subsegments (16 AHA segments subdivided into an endocardial and epicardial layer). Ischemic burden was calculated as the number of involved subsegments, assigning 3% of myocardium to each subsegment. Epicardial coronary artery disease was excluded by computed tomography or invasive coronary angiography. LV myocardial deformation was evaluated by 2D and 3D speckle-tracking echocardiography (STE), including global longitudinal strain (GLS), peak systolic dispersion (PDS), global circumferential strain (GCS), global radial strain (GRS), area strain, twist and torsion. Results 31 P enrolled (51%male,age57.8 ± 15.5years). Asymmetric septal hypertrophy was seen in 55%, apical in 29%, concentric in 16%,maximal wall thickness (MWT) of 20.5 ± 4.9mm; 26% with LVOT obstruction; LV ejection fraction 67.9 ± 7.9%. In 2DSTE analysis, P with more ischemia (>20%of LV) presented more severe impaired GLS and greater PDS, comparing with patients with ≤20% of ischemia. Similarly, 3DSTE imaging showed worse LV performance in P with greater ischemic burden, expressed by significant difference in GLS, GRS and area strain. GCS also trended to be worse in the presence of >20% of ischemia. The stronger correlation was found between 2D GLS and ischemic burden (Pearson correlation factor 0.545; p = 0.002). Conclusion In HCM, the severity of ischemia secondary to MCD was associated with impairment in LV myocardial deformation evaluated by 2D and 3D STE. Table 1. Echocardiography Ischemic burden (% of LV) 2D parameters ≤ 20% (n = 15) > 20% (n = 16) p-value GLS (%) -15.6 ± 2.7 -12.1 ± 4.7 0.016 PSD (ms) 73.2 ± 25.6 102.1 ± 57.6 0.150 3D parameters GLS (%) -10.3 ± 4.5 -7.3 ± 3.0 0.010 GCS (%) -12.6 ± 3.0 -10.1 ± 4.5 0.079 GRS (%) 30.8 ± 8.5 22.8 ± 11.4 0.035 Area strain(%) -20.8 ± 4.9 -15.8 ± 6.3 0.020 Twist (deg) 6.0 ± 4.8 4.1 ± 4.0 0.175 Torsion (deg/cm) 1.2 ± 0.9 0.8 ± 0.7 0.232

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Tian, Di, JingYu Zhang, YiFan He, ZiQi Xiong, Min Zhao, Shuai Hu, QingWei Song et ZhiYong Li. « Predictive value of left atrial strain analysis in adverse clinical events in patients with hypertrophic cardiomyopathy : a CMR study ». BMC Cardiovascular Disorders 23, n^o 1 (23 janvier 2023). http://dx.doi.org/10.1186/s12872-023-03069-2.

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Abstract Background A subset of patients with hypertrophic cardiomyopathy (HCM) will experience adverse clinical events such as heart failure (HF), cardiovascular death, and new-onset atrial fibrillation (AF). Current risk stratification methods are imperfect and limit the identification of patients at high risk for HCM. This study aimed to evaluate the role of cardiac magnetic resonance (CMR)-derived left atrial strain parameters in the occurrence of adverse clinical events in patients with HCM. Methods Left atrial (LA) structural, functional, and strain parameters were evaluated in 99 patients with HCM and compared with 89 age-, sex-, and BMI-matched control subjects. LA strain parameters were derived from CMR two- and four-chamber cine images by a semiautomatic method. LA strain parameters include global longitudinal strain (GLS) and global circumferential strain (GCS). The LA GLS includes reservoir strain (GLS reservoir), conduit strain (GLS conduit), and booster strain (GLS booster). Three LA GLS strain rate (SR) parameters were derived: SR reservoir, SR conduit, and SR booster. The primary endpoint was set as a composite of adverse clinical events, including SCD, new-onset or worsening to hospitalized HF, new-onset AF, thromboembolic events, and fatal ventricular arrhythmias. Results LA GLS, GLS SR and GCS were impaired in HCM patients compared to control subjects (all p < 0.001). After a mean follow-up of 37.94 ± 23.69 months, 18 HCM patients reached the primary endpoint. LA GLS, GLS SR, and GCS were significantly lower in HCM patients with adverse clinical events than in those without adverse clinical events (all p < 0.05). In stepwise multiple Cox regression analysis, LV SV, LA diameter, pre-contraction LAV (LAV pre-ac), passive LA ejection fraction (EF), and LA GLS booster were all independent determinants of adverse clinical events. LA GLS booster ≤ 8.9% was the strongest determinant (HR = 8.9 [95%CI (1.951, 40.933)], p = 0.005). Finally, LA GLS booster provided predictive adverse clinical events value (AUC = 0.86 [95%CI 0.77–0.98]) that exceeded traditional outcome predictors. Conclusion LA strain assessment, a measure of LA function, provides additional predictive information for established predictors of HCM patients. LA GLS booster was independently associated with adverse clinical events in patients with HCM.

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Meucci, Maria Chiara, Rosa Lillo, Antonella Lombardo, Gaetano A. Lanza, Marianne Bootsma, Steele C. Butcher, Massimo Massetti et al. « Comparative analysis of right ventricular strain in Fabry cardiomyopathy and sarcomeric hypertrophic cardiomyopathy ». European Heart Journal - Cardiovascular Imaging, 28 juillet 2022. http://dx.doi.org/10.1093/ehjci/jeac151.

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Abstract Aims To perform a comparative analysis of right ventricle (RV) myocardial mechanics, assessed by 2D speckle-tracking echocardiography (2D-STE), between patients with Fabry disease and patients with sarcomeric disease. Methods and results Patients with Fabry cardiomyopathy (FC) (n = 28) were compared with patients with sarcomeric hypertrophic cardiomyopathy (HCM), matched for degree of left ventricle hypertrophy (LVH) and demographic characteristics (n = 112). In addition, patients with Fabry disease and no LVH [phenotype-negative carriers of pathogenic α-galactosidase gene mutations (GLA LVH-)] (n = 28) were compared with age and sex-matched carriers of sarcomeric gene mutations without LVH [Phenotype-negative carriers of pathogenic sarcomeric gene mutations (Sarc LVH-)] (n = 56). Standard echocardiography and 2D-STE were performed in all participants. Despite a subtle impairment of RV global longitudinal strain (RV-GLS) was common in both groups, patients with FC showed a more prominent reduction of RV free wall longitudinal strain (RV-FWS) and lower values of difference between RV-FWS and RV-GLS (ΔRV strain), in comparison to individuals with HCM (P < 0.001 and P = 0.002, respectively). RV-FWS and ΔRV strain demonstrated an independent and additive value in discriminating FC from HCM, over the presence of symmetric LVH, systolic anterior motion of the mitral valve and RV hypertrophy. Similar results were found in GLA LVH- patients: they had worse RV-FWS and lower values of ΔRV strain as compared to Sarc LVH- patients (both P < 0.001). Conclusion Patients with FC show a specific pattern of RV myocardial mechanics, characterized by a larger impairment of RV-FWS and lower ΔRV strain in comparison to patients with HCM, which may be helpful in the differential diagnosis between these two diseases.

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Barbosa, A. R., C. M. O'neill, C. Ruivo, I. Cruz, O. Sousa, N. Dias Ferreira, P. Braga et L. Rocha Lopes. « P5270Impaired myocardial deformation assessed by cardiac magnetic resonance is associated with increased arrhythmic risk in hypertrophic cardiomyopathy ». European Heart Journal 40, Supplement_1 (1 octobre 2019). http://dx.doi.org/10.1093/eurheartj/ehz746.0241.

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Abstract Background Strain techniques, such as feature tracking cardiac magnetic resonance (FT-CMR), have emerged as a promise for more accurate evaluation of cardiac function compared to ejection fraction. In hypertrophic cardiomyopathy (HCM) patients, impaired myocardial deformation measured by FT-CMR has been associated with severity of hypertrophy and presence of late gadolinium enhancement (LGE) but associations with clinical severity and prognosis are scarce. Purpose To analyse the association between left ventricular strain measured by FT-CMR, morphologic features and prognostic markers in patients with HCM. Methods Retrospective analysis of clinical, echocardiography, Holter and CMR data of HCM patients aged ≥16 years followed at two referral centres. Ventricular arrhythmias (VA) were defined as non-sustained or sustained ventricular tachycardia or sudden cardiac arrest. Sudden cardiac death (SCD) risk was evaluated using the score proposed by the European Society of Cardiology. LGE extension was evaluated using the American Heart Association 17-segment model. FT-CMR was used to evaluate global peak systolic longitudinal (GLS), radial (GRS) and circumferential (GCS) strains - GLS was averaged from three standard longitudinal views while GRS and GCS were averaged from the basal, mid and apical LV short-axis planes. Results A total of 109 HCM patients (59.2±16.2 years old; 60.6% males) were included; mean follow-up was 39±25 months. Mean LV mass was 170.6±70.3g, LVEF was 63.7±10.0% and the number of segments with LGE was 3.14±3.32. Mean GLS, GRS and GCS were −14.8±4.0%, 34.4±13.3% and −17.5±4.8%, respectively. Impaired strain was associated with higher LV mass (GLS: r=0.46, GRS: r=−0.46, GCS: r=0.47, p<0.001 for all), reduced LVEF (GLS: r=−0,33, GRS: r=0,44, GCS: r=−0.41, p<0.003 for all) and LGE extension (GLS: r=0.26, GRS: r=−0.38, GCS: r=0.38, p<0.01 for all). SCD risk score was 3.12%±2.98 (8 patients scored as high risk) and VA were documented in 26 patients (26%). Patients with VA had worse strain values than those without (GLS −13.2±4.12 vs −15.5±3.71, p=0.011; GCS −15,8±5.22 vs −18.3±4.24, p=0.017). Patients with high estimated risk of SCD also had worse strain values than those at low/intermediate risk (GLS −12.2±3.57 vs −15.1±3.83, p=0.048; GCS −14.5±4.26 vs −17.9±4.54, p=0.047). A correlation between SCD risk and GLS and GCS was observed (r=0.32, p=0.004; r=0.23, p=0.03, respectively). Conclusions In our population, worse strain measurements were associated with a more severe HCM phenotype, presence of VA and a higher estimated risk of SCD. Strain assessed by FT-CMR may improve risk stratification in HCM patients.

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Patsourakos, D., C. Aggeli, K. Gatzoulis, S. Delicou, Y. Dimitroglou, A. Androulakis et K. Tsioufis. « Left atrial deformation parameters among beta-thalassemia major patients ». European Heart Journal 42, Supplement_1 (1 octobre 2021). http://dx.doi.org/10.1093/eurheartj/ehab724.011.

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Abstract Introduction Atrial cardiomyopathy is present in a significant proportion of beta thalassemia major (β-TM) patients, complicating their clinical condition. The diagnosis of atrial cardiomyopathy is challenging using conventional echocardiographic techniques. Purpose In our study we aimed to identify the presence of atrial cardiomyopathy by applying novel echocardiographic techniques in these patients. Methods 56 β-TM patients (mean age 39.3±9 years, 50% male sex) and 30, age and sex matched, healthy controls were examined by transthoracic echocardiography. Conventional echocardiographic parameters were estimated alongside with deformation indices (left atrial strain at reservoir (LASr), conduit (LAScd) and contraction (LASct) phase respectively as well as left ventricular global longitudinal strain (GLS)). T2* was calculated by cardiac magnetic resonance imaging in β-TM patients. Results LAVI, E/e' ratio, GLS and left atrial deformation parameters differed between patients and controls. In patient group, left atrial deformation indices were correlated with LAVI, E/e' ratio, GLS and T2* (Table 1). GLS was also correlated with LAVI, but not with T2* or E/e' ratio. T2* was correlated only with left atrial deformation indices. Patient with prior episodes of atrial fibrillation were older, had increased E/e' and LAVI and impaired left atrial deformation indices but did not differ in terms of GLS or T2* (Figure 1). Patients with iron overload differed only in terms of left atrial deformation parameters. Conclusions Atrial deformation indices could be of clinical use in the early detection of atrial cardiomyopathy. Impaired left atrial strain may be associated with silent atrial fibrillation and be indicative of myocardial iron overload. Funding Acknowledgement Type of funding sources: None. Correlation tableScatter plot of T2* and LASr

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Ker, J. « Walking in a straight line–the early detection of cardiomyopathy by the general physician ». European Heart Journal 42, Supplement_1 (1 octobre 2021). http://dx.doi.org/10.1093/eurheartj/ehab724.0718.

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Abstract Introduction The orientation of muscle fibers in the left ventricle is sophisticated. This peculiar orientation causes the left ventricle to contract in three directions–longitudinal, radial and circumferential. Normal myocardial mechanics is essential for systolic and diastolic function. For the clinician an impairment in longitudinal function is of utmost importance, as it has been shown to be an early marker of left ventricular dysfunction, be that systolic or diastolic. Longitudinal function of the left ventricle can be quantified with tissue velocity imaging (TVI), mitral annular plane systolic excursion (MAPSE) and global longitudinal strain (GLS), as measured by speckle-tracking. GLS measured by speckle-tracking is more technically challenging than measuring MAPSE and furthermore, in a setting with limited resources, not always widely available. Surprisingly, there is a paucity of data on the correlation of GLS to MAPSE. As GLS is the latest modality used to quantify longitudinal function of the LV and TVI is also more technically challenging than MAPSE, MAPSE was the chosen modality to compare to GLS. Furthermore, not all echocardiography systems are equipped for TVI and GLS, whereas that is not the case for MAPSE. MAPSE is therefore an easily acquired skill and widely available. Purpose of this study To determine whether MAPSE, when compared to GLS, is an accurate way to quantify longitudinal function of the left ventricle. If this is shown to be the case, then MAPSE will be a proven, readlily available and easily acquired skill to detect cardiomyopathy, whether primary or secondary to a wide variety of systemic diseases. Methods 175 patients who presented with a variety of primary cardiac diseases and/or systemic diseases with the potential for cardiac involvement were included into the study. 175 patients with normal cardiac function were also included into the study. Left ventricular longitudinal function of the left ventricle was quantified in each patient by means of MAPSE, as well as GLS measured by speckle-tracking. In order to correct MAPSE to body size, MAPSE:LV length was measured. The correlation of MAPSE with GLS was assessed by means of a two-by-two table. Results In this group of 350 patients, split into 2 equal groups-175 with cardiomyopathy, either primary or secondary due to systemic disease, and 175 with no cardiomyopathy, the distinction is clear. The exposore, a GLS <−20% and a MAPSE:LV-lenghth <20% versus no exposure – a GLS <−20% and a MAPSE: LV-length >20% leads to a likelihood ratio of 485 (p=0) and a Pearson correlation of 525 (p=0) that impaired LV-longitudinal function is present. Conclusion A MAPSE: LV-length <20% correlates reliably with an impaired GLS. This is a reliable substitute for GLS and for the general physician who screens for early cardiomyopathy this is a skill that will be cheaper and more easily learned than GLS. Funding Acknowledgement Type of funding sources: None. GLSMAPSE

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Pena, José Luiz Barros, Wander Costa Santos, Maria Helena Albernaz Siqueira, Isaac Hermes Sampaio, Isabel Cristina Gomes Moura et Eduardo Back Sternick. « Glycogen storage cardiomyopathy (PRKAG2) : diagnostic findings of standard and advanced echocardiography techniques ». European Heart Journal - Cardiovascular Imaging, 3 août 2020. http://dx.doi.org/10.1093/ehjci/jeaa176.

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Abstract Aims Describe the findings obtained using standard echocardiography (Echo) and deformation indices (2D and 3D speckle tracking strain) in patients (Pts) with PRKAG2 cardiomyopathy. Seek to identify any peculiar characteristics and possible strain patterns that may distinguish this condition from other causes of left ventricular hypertrophy (LVH). Methods and results Thirty Pts with genetically proven PRKAG2 (R302Q and H401Q), 16 (53.3%) male, mean age 39.1± 15.4 years old, were examined using standard, speckle tracking (STE), and 3D Echo. Pacemaker (PM) had been implanted in 12 (40%) Pts with a mean age of 38.1 ± 13 years. Hypertrophy was found in varying degrees in 18 (86%) Pts. Seven Pts (24%) presented 3D ejection fraction (EF) below normal limits. Diastolic function was abnormal in 17 (63%) Pts. Global longitudinal strain (GLS) on 2D measured −16.4% ± 5.3%. GLS measured −13.2% ± 4.8%, global radial strain 40.8% ± 13.8%, global circumferential strain (GCS) −16.1% ± 4.4%, and global area strain −26.1% ± 6.7% by 3D Echo offline analyses. Pts with PM presented lower EF and GCS compared with those without PM. EF/GLS measured 3.65 ± 1.00. In the bull's eye map, a strain pattern similar to stripes in 18 (60%) Pts was identified, which might be a differentiating signal among LVH. Conclusion Echocardiography is a valuable tool in detecting diffuse and focal myocardial abnormalities in PRKAG2 cardiomyopathy. The deformation indices are especially revealing because they may help distinguish this rare infiltrative disease, thereby favouring early diagnosis, enhanced treatment, and improved outcome.

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Triantafyllidi, H., D. Birba, I. Ikonomidis, G. Makavos, D. Benas, D. V. Cokkinos et E. Iliodromitis. « P3552Estimating left ventricular myocardial deformation during cardiopulmonary exercise testing in patients with dilated cardiomyopathy and reduced ejection fraction ». European Heart Journal 40, Supplement_1 (1 octobre 2019). http://dx.doi.org/10.1093/eurheartj/ehz745.0415.

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Abstract Background Cardiopulmonary exercise testing (CPET) has been recognized as a valuable tool regarding the integrated estimation of exercise ability in patients with several cardiopulmonary diseases, dilated cardiomyopathy (DCM) included. Left ventricular (LV) abnormal myocardial deformation might be studied by newer echocardiography techniques. Aim of this study is to explore differences of LV myocardial deformation in DCM patients during a CPET session. Methods Forty-four DCM patients (mean age 53±13 years, 34 men) with an ejection fraction <50% (mean EF = 33±10%) and no history of previous pulmonary disease were subjected to maximum CPET. Simultaneously, we estimated LV myocardial deformation using speckle tracking imaging and we measured global longitudinal strain (GLS), longitudinal strain rate both at systole (GLSrS) and diastole (GLSrE) at baseline and at peak exercise. The difference between GLS at baseline-GLS at peak exercise was defined as GLS difference. Results All patients finished uneventfully CPET (peakVO2 = 20±7 ml/min/kg) and improved GLS at peak exercise (GLS difference = 1.5±2). We found that at peak exercise, systolic blood pressure (SBP) was increased (119±14 vs. 159±23 mmHg, p<0.001) while GLS (−12.5±4 vs. −14±5, p<0.001), GLSrS (−0.7±0.2 and −1.0±0.4, p<0.001) and GLSrE (0.7±0.4 and 1.0±0.6, p=0.001) were improved. A positive correlation between peakVO2 and GLS difference was found, independent of peak SBP (β=0.38, p=0.01). Relationship between GLS dif and CPET Conclusions Patients with dilated cardiomyopathy and ejection fraction <50% present an increased exercise ability when they manage to improve LV GLS during maximum exercise. Consequently, LV GLS improvement during exercise characterizes beside patient's exercise ability the severity of heart failure as well.

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Segura-Rodríguez, Diego, Francisco José Bermúdez-Jiménez, Lorena González-Camacho, Eduardo Moreno Escobar, Rocío García-Orta, Juan Emilio Alcalá-López, Alicia Bautista Pavés et al. « Layer-Specific Global Longitudinal Strain Predicts Arrhythmic Risk in Arrhythmogenic Cardiomyopathy ». Frontiers in Cardiovascular Medicine 8 (15 novembre 2021). http://dx.doi.org/10.3389/fcvm.2021.748003.

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Background: Arrhythmogenic cardiomyopathy (AC) is a life-threatening disease which predispose to malignant arrhythmias and sudden cardiac death (SCD) in the early stages of the disease. Risk stratification relies on the electrical, genetic, and imaging data. Our study aimed to investigate how myocardial deformation parameters may identify the subjects at risk of known predictors of major ventricular arrhythmias.Methods: A cohort of 45 subjects with definite or borderline diagnosis of AC was characterized using the advanced transthoracic echocardiography (TTE) and cardiac magnetic resonance (CMR) and divided into the groups according to the potential arrhythmic risk markers, such as non-sustained ventricular tachycardia (NSVT), late gadolinium enhancement (LGE), and genetic status. Layer-specific global longitudinal strain (GLS) by TTE 2D speckle tracking was compared in patients with and without these arrhythmic risk markers.Results: In this study, 23 (51.1%) patients were men with mean age of 43 ± 16 years. Next-generation sequencing identified a potential pathogenic mutation in 39 (86.7%) patients. Thirty-nine patients presented LGE (73.3%), mostly located at the subepicardial-to-mesocardial layers. A layer-specific-GLS analysis showed worse GLS values at the epicardial and mesocardial layers in the subjects with NSVT and LGE. The epicardial GLS values of −15.4 and −16.1% were the best cut-off values for identifying the individuals with NSVT and LGE, respectively, regardless of left ventricular ejection fraction (LVEF).Conclusions: The layer-specific GLS assessment identified the subjects with high-risk arrhythmic features in AC, such as NSVT and LGE. An epicardial GLS may emerge as a potential instrument for detecting the subjects at risk of SCD in AC.

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Kinova, E., D. Somleva, N. Spasova, A. Borizanova et A. Goudev. « P1353 Left ventricular performance patterns in patients with dilated cardiomyopathy and advanced heart failure ». European Heart Journal - Cardiovascular Imaging 21, Supplement_1 (1 janvier 2020). http://dx.doi.org/10.1093/ehjci/jez319.788.

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Abstract Background Left ventricular (LV) global longitudinal strain (GLS) is a more sensitive parameter than ejection fraction in the assessment of LV function. It has been established as a predictor of cardiac death and adverse events. In patients with dilated cardiomyopathy (DCM) LV deformation and twist mechanics are reduced in varying degrees. Purpose The aim of the study was to determine different LV performance patterns in patients with DCM and advanced heart failure (HF). Methods In 52 patients with DCM with HF NYHA class III-IV (62 ± 13 years, 36 males) LV function had been assessed by conventional, Tissue Doppler and 2D-speckle tracking echocardiography (2D-STE) with measurement of GLS, circumferential strain (CS) and twist mechanics. Patients were divided into two groups: with GLS≥-7 %, and GLS<-7 %. Results In a group with more reduced GLS≥-7% systolic parameters were worse, Table. Systolic velocities of medial and lateral mitral annulus (S’lat), and CS at the LV basal and mid levels (CSmid) were significantly more altered. Rotational parameters did not differ between the groups. In a multivariate regression model CSmid (p < 0.0001; B = 0.66, 95%CI [0.37 ÷ 0.95]), S’lat (p = 0.001; B=-0.34, 95%CI [-1.5÷-0.46]) and VCW (p = 0.002; B = 0.31, 95%CI [0.15 ÷ 0.66]) were independent predictors of GLS. ROC curves identified CSmid (AUC 0.91, p < 0.0001) and VCW (AUC 0.69, p = 0.02) as the best discriminators of patients with severely reduced GLS≥-7%. Conclusions Patients with DCM and HF with severely depressed LV function assessed by GLS were characterized with more altered CS and more pronounced MR. Rotational parameters failed to be significant determinants of LV performance. Echocardiographic parameters GLS≥-7% N = 24 GLS<-7% N = 28 p End diastolic volume index(ml/m²) 113.55 ± 41.64 87.98 ± 26.98 0.01 End systolic volume index(ml/m²) 84.50 ± 39.05 55.51 ± 21.93 0.001 Ejection fraction (%) 28 ± 8 35 ± 7 0.001 Systolic velocity of medial mitral annulus (cm/sec) 3.57 ± 0.81 4.88 ± 1.52 0.001 Systolic velocity of lateral mitral annulus (cm/sec) 4.38 ± 1.09 5.38 ± 1.42 0.014 Circumferential strain at basal level (%) -5.92 ± 3.15 55.52 ± 21.93 0.014 Circumferential strain at mid-level (%) -5.11 ± 1.77 -8.71 ± 2.34 <0.0001 Epicardial Torsion (°/cm) 0.31 ± 0.18 0.47 ± 0.35 0.05 Vena contracta width of mitral regurgitation (mm) 7.34 ± 2.23 5.58 ± 2.82 0.017 GLS - global longitudinal strain.

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Isaza, N., A. Alashi, J. Faulx, Z. B. Popovic, V. Menon, M. Faulx, B. P. Griffin et M. Y. Desai. « P1951Serial left ventricular global longitudinal strain and mortality in patients with Takotsubo cardiomyopathy ». European Heart Journal 40, Supplement_1 (1 octobre 2019). http://dx.doi.org/10.1093/eurheartj/ehz748.0698.

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Abstract Background Recent studies on Takotsubo cardiomyopathy (TC) have challenged the common conception that it is a relatively benign condition with functional recovery observed in the majority of cases. However, it is important to recognize that overt functional recovery might not reflect the true regional recovery, which might have an adverse impact on survival. Objective We sought to assess baseline and follow-up left ventricular function characteristics and their impact on longer-term mortality in patients presenting with documented Takotsubo cardiomyopathy (TC) at a tertiary centre. Methods 339 patients (66±14 years, 88% women) presented to our centre between 2006 and 2018 with acute anginal symptoms and were subsequently diagnosed with TC following clinical and angiographic evaluation. All patients returned for a follow-up evaluation including transthoracic echocardiography (TTE). Baseline and follow-up (3–6 months after TC diagnosis) LV ejection fraction (LVEF) and LV global longitudinal strain (LV-GLS using velocity vector imaging) were recorded on TTE. The primary endpoint was longer-term mortality. Results Hypertension, dyslipidaemia, and diabetes were present in 71%, 56%, and 26% of patients. Baseline mean troponin I peak, LVEF and LV-GLS were 0.9±7 ng/ml, 36±9%, and 11±3%; respectively. 94% had baseline LVEF<50%, 272 (80%) had apical ballooning, and 94% had LV-GLS worse than −18%. No patient had angiographically obstructive coronary artery disease. At 3–6 months follow-up, mean LVEF, and LV-GLS improved to 57±9% and 16±3%, respectively. 87% of patients had LVEF >50%, but in 70% LV-GLS remained worse than −18%. After 3.3±3 years, 72 patients (21%) died. On multivariable Cox survival analysis (adjusted for age, gender, baseline troponin peak and follow up LVEF), follow up LV-GLS was independently associated with longer-term mortality (hazard ratio 1.12 [95% confidence interval 1.05, 1.20], p<0.001). Significantly more patients with follow up LV-GLS worse than −18% died vs. those with LV-GLS better than −18% (57/237 [24%] vs. 15/102 [15%], log-rank statistic p-value 0.01, Kaplan-Meier figure 1). Kaplan-Meier curve of freedom from death Conclusions In this large single-centre study of patients with documented TC (majority women), 87% recovered LVEF at 3–6 months, but in 70% LV-GLS remained worse than −18%, which was independently associated with higher longer-term mortality.

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Ochs, Andreas, Johannes Riffel, Marco M. Ochs, Nisha Arenja, Thomas Fritz, Christian Galuschky, Andreas Schuster et al. « Myocardial mechanics in dilated cardiomyopathy : prognostic value of left ventricular torsion and strain ». Journal of Cardiovascular Magnetic Resonance 23, n^o 1 (décembre 2021). http://dx.doi.org/10.1186/s12968-021-00829-x.

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Abstract Background Data on the prognostic value of left ventricular (LV) morphological and functional parameters including LV rotation in patients with dilated cardiomyopathy (DCM) using cardiovascular magnetic resonance (CMR) are currently scarce. In this study, we assessed the prognostic value of global longitudinal strain (GLS), global circumferential strain (GCS), global radial strain (GRS) and LV torsion using CMR feature tracking (FT). Methods CMR was performed in 350 DCM patients and 70 healthy subjects across 5 different European CMR Centers. Myocardial strain parameters were retrospectively assessed from conventional balanced steady-state free precession cine images applying FT. A combined primary endpoint (cardiac death, heart transplantation, aborted sudden cardiac death) was defined for the assessment of clinical outcome. Results GLS, GCS, GRS and LV torsion were significantly lower in DCM patients than in healthy subjects (all p < 0.001). The primary endpoint occurred in 59 (18.7%) patients [median follow-up 4.2 (2.0–5.6) years]. In the univariate analyses all strain parameters showed a significant prognostic value (p < 0.05). In the multivariate model, LV strain parameters, particularly GLS provided an incremental prognostic value compared to established CMR parameters like LV ejection fraction and late gadolinium enhancement. A scoring model including six categorical variables of standard CMR and strain parameters differentiated further risk subgroups. Conclusion LV strain assessed with CMR FT has a high prognostic value in patients with DCM, surpassing routine and dedicated functional parameters. Thus, CMR strain imaging may contribute to the improvement of risk stratification in DCM.

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Usuku, Hiroki, Seiji Takashio, Eiichiro Yamamoto, Toshihiro Yamada, Fumi Oike, Koichiro Fujisue, Daisuke Sueta, Kenichi Matsushita et Kenichi Tsujita. « Abstract 10493 : Prognostic Value of Right Ventricular Longitudinal Strain in Transthyretin Amyloid Cardiomyopathy ». Circulation 144, Suppl_1 (16 novembre 2021). http://dx.doi.org/10.1161/circ.144.suppl_1.10493.

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Introduction: This study was performed to investigate whether right ventricular global longitudinal strain (RV-GLS) provides prognostic information in patients with wild-type transthyretin amyloid cardiomyopathy (ATTRwt-CM). Methods and Results: Among 129 patients who were diagnosed with ATTRwt-CM at Kumamoto University Hospital from December 2002 to December 2019, 111 patients who had enough information for two-dimensional speckle tracking imaging were retrospectively analyzed in this study. During a median follow-up of 615 days (25 th -75 th percentile; 318-1082 days), 26 cardiovascular deaths occurred. Compared with patients in the non-event group, those in the cardiovascular death group had significantly lower RV-GLS (10.9±2.7% vs. 12.8±3.5%, p<0.05) and right ventricular free wall longitudinal strain (13.1±3.3% vs. 15.5±3.8%, p<0.01). However, conventional echocardiographic findings, such as left ventricular ejection fraction and E/e’ ratio were not significantly different between these two groups. Receiver operating characteristic analysis showed that the area under the curve of RV-GLS for cardiovascular death was 0.668 and that the best cutoff value of RV-GLS was 11.59% (sensitivity 69.2%; specificity, 63.5%). In the Kaplan-Meier analysis, patients with ATTRwt-CM who had low RV-GLS (<11.59%) had a significantly higher probability of total cardiovascular death (p<0.01). After adjusting for conventional predictive factors (age, history of heart failure, hs-cTnT, and B-type natriuretic peptide), low RV-GLS was significantly and independently associated with cardiovascular death in patients with ATTRwt-CM (odds ratio, 3.40; 95% confidence interval, 1.26-9.18; p<0.05). Conclusions: RV-GLS has significant prognostic value in patients with ATTRwt-CM and provides greater prognostic power than conventional echocardiographic parameters.

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Morioka, Mami, Seiji Takashio, Naoya Nakashima, Masato Nishi, Akira Fujiyama, Kyoko Hirakawa, Shinsuke Hanatani et al. « Correlation Between Cardiac Images, Biomarkers, and Amyloid Load in Wild‐Type Transthyretin Amyloid Cardiomyopathy ». Journal of the American Heart Association, 14 juin 2022. http://dx.doi.org/10.1161/jaha.121.024717.

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Background Several imaging parameters and biomarkers provide diagnostic and prognostic information for wild‐type transthyretin amyloid cardiomyopathy. However, the relevance of these parameters and their association with cardiac amyloid load requires further substantiation. We aimed to elucidate the association of imaging parameters obtained using 99m Tc‐labeled pyrophosphate scintigraphy, cardiovascular magnetic resonance imaging, global longitudinal strain (GLS), and cardiac biomarkers with cardiac amyloid load in patients with wild‐type transthyretin amyloid cardiomyopathy. Methods and Results Eighty‐eight patients with wild‐type transthyretin amyloid cardiomyopathy who underwent 99m Tc‐labeled pyrophosphate scintigraphy and cardiovascular magnetic resonance were retrospectively evaluated. Quantitative cardiac amyloid load was obtained from 61 patients after myocardial biopsy. Correlations were assessed using Pearson’s correlation coefficient applied to medical record data. The mean heart to contralateral ratio, native T1, extracellular volume, and GLS were 1.91±0.36, 1419.4±56.4 ms, 56.5±13.6%, and −9.4±2.5%, respectively. Median high‐sensitivity cardiac troponin T (hs‐cTnT) and BNP (B‐type natriuretic peptide) levels were 0.0478 (0.0334‐0.0691) ng/mL and 213.8 (125.8–392.7) pg/mL, respectively. The mean cardiac amyloid load was 22.9±15.0%. The heart to contralateral ratio correlated significantly with native T1 ( r =0.397), extracellular volume ( r =0.477), GLS ( r =0.363), cardiac amyloid load ( r =0.379), and Ln (hs‐cTnT) ( r =0.247). Further, cardiac amyloid load correlated significantly with native T1 ( r =0.509), extracellular volume ( r =0.310), GLS ( r =0.446), and Ln (hs‐cTnT) ( r =0.354). Compared with BNP, hs‐cTnT levels better correlated with several imaging parameters and cardiac amyloid load. Conclusions Increased cardiac amyloid load correlated with increased 99m Tc‐labeled pyrophosphate positivity, native T1, extracellular volume, and hs‐cTnT levels, and an impaired GLS, suggesting that imaging parameters and cardiac biomarkers may reflect histological and functional changes attributable to amyloid deposition in the myocardium.

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Shen, Meng-ting, Zhi-gang Yang, Kai-yue Diao, Li Jiang, Yi Zhang, Xi Liu, Yue Gao, Bi-yue Hu, Shan Huang et Ying-kun Guo. « Left Ventricular Involvement in Arrhythmogenic Right Ventricular Dysplasia/Cardiomyopathy Predicts Adverse Clinical Outcomes : A Cardiovascular Magnetic Resonance Feature Tracking Study ». Scientific Reports 9, n^o 1 (2 octobre 2019). http://dx.doi.org/10.1038/s41598-019-50535-z.

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Abstract The aim of this study was to investigate left ventricular (LV) global myocardial strain and LV involvement characteristics in patients with arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) and to evaluate their predictive value of adverse cardiac events. Sixty consecutive ARVD/C patients with a definite diagnosis of ARVD/C who underwent CMR examination and thirty-four healthy controls were enrolled retrospectively. The CMR images were analyzed for LV myocardial strain and the presence of LV involvement. The endpoint was defined as a composite of sustained ventricular tachycardia or fibrillation, cardiac death, resuscitated cardiac arrest, heart transplantation, and appropriate implantable cardioverter-defibrillator shock. LV global longitudinal (GLS), circumferential (GCS), and radial strain (GRS) were significantly impaired in ARVC/D patients compared to healthy controls (GLS: −13.89 ± 3.26% vs. −16.68 ± 2.74%, GCS: −15.65 ± 3.40% vs. −19.20 ± 2.23%, GRS: 34.57 ± 11.98% vs. 49.92 ± 12.59%; P < 0.001 for all). Even in ARVC/D patients with preserved LVEF, LV GLS, GCS and GRS were also significantly reduced than in controls. During a mean follow-up period of 4.10 ± 1.77 years, the endpoint was reached in 17 patients. LV GLS >−12.65% (HR, 3.58; 95%CI, 1.14 to 11.25; p = 0.029) and history of syncope (HR, 4.99; 95%CI, 1.88 to 13.24; p = 0.001) were the only independent predictors of cardiac outcomes. The LV myocardial deformation derived from FT CMR was significantly impaired in ARVD/C patients, and this alteration can occur before the impairment of LVEF. LV GLS >−12.65% and history of syncope were the only independent prognostic markers of adverse cardiac outcomes.

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De Luca, Antonio, Chiara Cappelletto, Maria Perotto, Davide Stolfo, Marco Merlo et Gianfranco Sinagra. « 415 Correlation between tissue abnormalities and myocardial deformation indices in arrhythmogenic cardiomyopathy : a pilot study ». European Heart Journal Supplements 23, Supplement_G (1 décembre 2021). http://dx.doi.org/10.1093/eurheartj/suab142.032.

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Abstract Aims To evaluate the correlation between cardiac magnetic resonance (CMR) tissue abnormalities and impairment of myocardial deformation indices in patients with definite diagnosis of arrhythmogenic cardiomyopathy (AC). Methods and results 41 AC Patients with available CMR study were enrolled. Myocardial deformation indices (i.e. global longitudinal strain -GLS-; global circumferential strain -GCS-; global radial strain -GRS-) for both ventricles were calculated using feature tracking analysis. Quantification of tissue abnormalities (i.e. late gadolinium enhancement -LGE- extension expressed as percentage of total ventricular mass) was performed. Spearman’s rho correlation was evaluated. Mean age was 44 ± 13 years and 26 (63%) patients were male. Mean left ventricular (LV) ejection fraction (EF) was 54 ± 10% and mean right ventricular (RV) EF was 49 ± 12%. Median LV LGE extension was 8.9% (1.05–21) and median RV LGE extension was 0 (0–6.92). All myocardial deformation indices were moderately associated with LGE extension (for LV 3D GLS Spearman’s Rho 0.423, P 0.016; 2D GCS Spearman’s Rho 0.388, P 0.028; 3D GCS 0.362, P 0.042; 2D GRS Spearman’s Rho −0.417, P 0.018; 3D GRS −0.396, P 0.025; for RV 2D GLS Spearman’s Rho 0.385, P 0.030; RV GCS Spearman’s Rho 0.450, P 0.010; RV GRS Spearman’s Rho −0.459, P 0.008). Conclusions All myocardial deformation indices showed a moderate association with LGE extension in a cohort of patients with definite AC. Further studies are needed to validate this observation and understand its implications.

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Onishi, Tetsuari, Kosuke Yoshii, Masato Tsuru, Akira Shimane, Katunori Okajima, Shinichiro Yamada, Yasuyo Taniguchi, Yoshinori Yasaka et Hiroya Kawai. « Abstract 19512 : Right Ventricular Global Longitudinal Strain Improves Diagnostic and Prognostic Assessment in Patients with Arrhythmogenic Right Ventricular Cardiomyopathy ». Circulation 130, suppl_2 (25 novembre 2014). http://dx.doi.org/10.1161/circ.130.suppl_2.19512.

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Introduction: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a heritable cardiomyopathy characterized by right ventricular (RV) myocardium dysfunction leading to RV failure and fatal arrhythmias. Hypothesis: RV global longitudinal strain (GLS) derived from two-dimensional speckle-tracking echocardiography (2DSTE) contributes to diagnostic and prognostic assessment in ARVC. Methods: We retrospectively evaluated the echocardiographic data of 67 patients referred with suspected ARVC and 27 age- and gender-matched healthy controls (Group C). Of 67 suspected ARVC patients, 34 patients (Group A) were diagnosed as ARVC, while remaining 33 patients (Group B) were not diagnosed due to not meeting criteria. Tricuspid annular plane systolic excursion (TAPSE), RV end-diastolic and end-systolic area (RVEDA, RVESA), RV fractional area change (RVFAC) and GLS were measured to assess the RV function. Outcome was assessed according to death and hospitalization with heart failure, fatal arrhythmia and appropriate defibrillator shock. Results: Patients in Group A had significantly reduced values of TAPSE, RVFAC and GLS, and significantly greater vales of RVEDA and RVESA in comparison among 3 groups. In Group A, 11 adverse cardiac events were observed during averaged 718 follow-up days. Multivariate Cox’s regression analysis showed that GLS was an independent prognostic factor. Kaplan-Meier survival analysis revealed there was a significant difference in outcome between patient groups divided by the median value (11%) of GLS in Group A. Conclusions: GLS in RV may be a tool to assist in diagnosis of ARVC, and be a superior prognostic factor in ARVC patients.

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Kažukauskienė, Ieva, Giedrė Balčiūnaitė, Vaida Baltrūnienė, Jelena Čelutkienė, Vytė Valerija Maneikienė, Sigitas Čibiras, Kęstutis Ručinskas et Virginija Grabauskienė. « Left ventricular global longitudinal strain predicts elevated cardiac pressures and poor clinical outcomes in patients with non-ischemic dilated cardiomyopathy ». Cardiovascular Ultrasound 19, n^o 1 (5 juin 2021). http://dx.doi.org/10.1186/s12947-021-00254-1.

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Abstract Background Risk stratification in patients with non-ischemic dilated cardiomyopathy (NI-DCM) is essential to treatment planning. Global longitudinal strain (GLS) predicts poor prognosis in various cardiac diseases, but it has not been evaluated in a cohort of exclusively NI-DCM. Although deformation parameters have been shown to reflect diastolic function, their association with other hemodynamic parameters needs further elucidation. We aimed to evaluate the association between GLS and E/GLS and invasive hemodynamic parameters and assess the prognostic value of GLS and E/GLS in a prospective well-defined pure NI-DCM cohort. Methods and results Forty-one patients with NI-DCM were enrolled in the study. They underwent a standard diagnostic workup, including transthoracic echocardiography and right heart catheterization. During a five-year follow-up, 20 (49%) patients reached the composite outcome measure: LV assist device implantation, heart transplantation, or cardiovascular death. Pulmonary capillary wedge pressure (PCWP), mean pulmonary artery pressure, pulmonary vascular resistance (PVR) correlated with GLS and E/GLS (p < 0.05). ROC analysis revealed that GLS and E/GLS could identify elevated PCWP (≥ 15 mmHg) and PVR (> 3 Wood units). Survival analysis showed GLS and E/GLS to be associated with short- and long-term adverse cardiac events (p < 0.05). GLS values above thresholds of –5.34% and -5.96% indicated 18- and 12-fold higher risk of poor clinical outcomes at one and five years, respectively. Multivariate Cox regression analysis revealed that GLS is an independent long-term outcome predictor. Conclusion GLS and E/GLS correlate with invasive hemodynamics parameters and identify patients with elevated PCWP and high PVR. GLS and E/GLS predict short- and long-term adverse cardiac events in patients with NI-DCM. Worsening GLS is associated with incremental risk of long-term adverse cardiac events and might be used to identify high-risk patients.

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Weise Valdés, Elena, Peter Barth, Misagh Piran, Kai Thorsten Laser, Wolfgang Burchert et Hermann Körperich. « Left-Ventricular Reference Myocardial Strain Assessed by Cardiovascular Magnetic Resonance Feature Tracking and fSENC—Impact of Temporal Resolution and Cardiac Muscle Mass ». Frontiers in Cardiovascular Medicine 8 (2 novembre 2021). http://dx.doi.org/10.3389/fcvm.2021.764496.

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Aims: Cardiac strain parameters are increasingly measured to overcome shortcomings of ejection fraction. For broad clinical use, this study provides reference values for the two strain assessment methods feature tracking (FT) and fast strain-encoded (fSENC) cardiovascular magnetic resonance (CMR) imaging, including the child/adolescent group and systematically evaluates the influence of temporal resolution and muscle mass on strain.Methods and Results: Global longitudinal (GLS), circumferential (GCS), and radial (GRS) strain values in 181 participants (54% women, 11–70 years) without cardiac illness were assessed with FT (CVI42® software). GLS and GCS were also analyzed using fSENC (MyoStrain® software) in a subgroup of 84 participants (60% women). Fourteen patients suffering hypertrophic cardiomyopathy (HCM) were examined with both techniques. CMR examinations were done on a 3.0T MR-system.FT-GLS, FT-GCS, and FT-GRS were −16.9 ± 1.8%, −19.2 ± 2.1% and 34.2 ± 6.1%. fSENC-GLS was higher at −20.3 ± 1.8% (p < 0.001). fSENC-GCS was comparable at−19.7 ± 1.8% (p = 0.06). All values were lower in men (p < 0.001). Cardiac muscle mass correlated (p < 0.001) with FT-GLS (r = 0.433), FT-GCS (r = 0.483) as well as FT-GRS (r = −0.464) and acts as partial mediator for sex differences. FT-GCS, FT-GRS and fSENC-GLS correlated weakly with age. FT strain values were significantly lower at lower cine temporal resolutions, represented by heart rates (r = −0.301, −0.379, 0.385) and 28 or 45 cardiac phases per cardiac cycle (0.3–1.9% differences). All values were lower in HCM patients than in matched controls (p < 0.01). Cut-off values were −15.0% (FT-GLS), −19.3% (FT-GCS), 32.7% (FT-GRS), −17.2% (fSENC-GLS), and −17.7% (fSENC-GCS).Conclusion: The analysis of reference values highlights the influence of gender, temporal resolution, cardiac muscle mass and age on myocardial strain values.

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Hirschberg, K., O. Paul, J. Salatzki, F. Andre, J. Riffel, M. Ochs, H. Vago, B. Merkely, H. A. Katus et M. Friedrich. « Contrast-agent free evaluation of cardiomyopathies with T1 mapping and the new fast strain-encoded (fSENC) magnetic resonance imaging ». European Heart Journal 41, Supplement_2 (1 novembre 2020). http://dx.doi.org/10.1093/ehjci/ehaa946.0218.

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Abstract Background Cardiomyopathies (CMP) may cause impairment of cardiac function and structure. Cardiac Magnetic Resonance Imaging (CMR) is used for analysis and risk stratification of CMP by Late Gadolinium Enhancement (LGE). However, T1 mapping (T1) and fast strain encoded (f-SENC) sequences allow contrast-free and faster exams. The aim of this study was to characterize CMP by T1 and f-SENC to develop a faster and safer CMR protocol (fast-CMR). Methods CMP scans from our CMR database were retrospectively analyzed. All patients were scanned at 1.5T/3T scanner. Study groups were divided as follows: Patients with normal findings, dilated cardiomyopathy (DCM), hypertrophic cardiomyopathy (HCM), hypertensive heart disease (HHD) and cardiac amyloidosis. Global T1 times, longitudinal (GLS) and circumferential (GCS) strain using f-SENC of study groups were compared to healthy individuals (controls). Scan time and amount of gadolinium-based contrast agent (CA) in CMR-protocol with LGE were compared to fast-CMR. Results 174 patients and 31 controls were recruited. T1 times, GLS and GCS were similar between controls and normal individuals. T1 times were significantly increased (p<0.05), while GLS and GCS were significantly reduced (p<0.05) in all CMR study groups compared to controls (Table 1). Using fast-CMR 21 (±6) min of scan time were saved, about 47%, and 9 (±2) ml of CA were saved per patient. Conclusion Normal findings could be identified by fast-CMR without contrast agent. Fast CMR might also be a useful tool to identify different forms of CMP. Funding Acknowledgement Type of funding source: None

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Ozawa, Koya, Nobusada Funabashi, Hiroyuki Takaoka et Yoshio Kobayashi. « Abstract 12721 : Compensatory Mechanism in HCM Patients With Preserved LV Ejection Fraction Determined by 2D Speckle Tracking Echocardiographic LV Myocardial Strain Gradient Using a Novel Multi-Layer Technique ». Circulation 130, suppl_2 (25 novembre 2014). http://dx.doi.org/10.1161/circ.130.suppl_2.12721.

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Introduction: A novel multi-layer technique on speckle tracking transthoracic echocardiography (TTE) can achieve quantitative strain measurements of all, subendocardial, and subepicardial layer of left ventricle (LV), respectively. Aim: To evaluate compensatory mechanism in hypertrophic cardiomyopathy (HCM) subjects with preserved LV ejection fraction (EF), we measured myocardial strain gradient by 2D LV global longitudinal (GLS) and circumferential strain (GCS) using a multi-layer technique on speckle tracking TTE. Methods: 60 subjects (40 HCM (30 male; age 62 ± 15 years, LV EF >50%, and 20 age matched controls (10 male; age 59 ± 10 years)) underwent TTE (Vivid E9, GE). Apical 4-, 2-, 3-chamber views for GLS and parasternal short-axis views at the level of mitral valve, papillary muscle, and apex for GCS were acquired. We defined myocardial strain gradient as the ratio of subendocardial strain to subepicardial strain. Results: GLS from each view were significantly smaller in HCM than controls in all, subendocardial, and subepicardial layers. GCS at all levels were significantly smaller in HCM than controls in all and subepicardial layer; however there were no significant differences in subendocardial GCS between both groups at mitral valve and papillary muscle levels. GLS gradient was significant greater in HCM than controls in GLS from 4 chamber views. GCS gradients were significantly greater in HCM than in controls at all levels. In HCM, subendocardial GCS at mitral valve and papillary muscle levels significantly positive correlated with LV EF (R=0.446, 0.34, respectively) and subendocardial GLS from 4-, and 2- chamber views, and subendocardial GCS at mitral valve and papillary muscles levels significantly negatively and GCS gradients at mitral valve and papillary muscle levels significantly positively correlated with interventricular septum thickness in end diastole (R=-0.44, -0.347, -0.335, -0.359, 0.363, and 0.373, respectively). Conclusions: In HCM subjects with preserved LV EF, GLS was significantly smaller than in controls, but GLS and GCS gradients tended to be greater than controls. We speculate that in HCM, subendocardial GCS was maintained in compensation for subendocardial GLS decrement; thus GCS gradient may increase.

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Cittar, Marco, Alberto Cipriani, Marco Merlo, Giancarlo Vitrella, Marco Masè, Anna Carrer, Giulia Barbati et al. « Prognostic Significance of Feature-Tracking Right Ventricular Global Longitudinal Strain in Non-ischemic Dilated Cardiomyopathy ». Frontiers in Cardiovascular Medicine 8 (30 novembre 2021). http://dx.doi.org/10.3389/fcvm.2021.765274.

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Aims: Left ventricular global longitudinal strain (GLS) by cardiac magnetic resonance feature tracking (CMR-FT) analysis has shown an incremental prognostic value compared to classical parameters in non-ischemic dilated cardiomyopathy (NICM). However, less is known about the role of right ventricular (RV) GLS. Our objective was to evaluate the prognostic impact of RV-GLS by CMR-FT analysis in a population of NICM patients.Methods: In this multicenter study, we examined NICM patients evaluated with a comprehensive CMR-FT study. Major cardiac events (MACEs) were considered as the study primary outcome measure and were defined as a composite of (a) cardiovascular death, (b) cardiac transplant or destination therapy ventricular assist device, (c) hospitalization for life-threatening ventricular arrhythmias or implantable cardiac defibrillator appropriate intervention. Heart failure (HF) related events, including hospitalizations and life-threatening arrhythmia-related events were considered as secondary end-points. Receiver operating time-dependent analysis were used to calculate the possible additional effect of RV-GLS to standard evaluation.Results: We consecutively enrolled 273 patients. During a median follow-up of 39 months, 41 patients (15%) experienced MACEs. RV-GLS and LV late gadolinium emerged as the strongest prognostic CMR-FT variables: their association provided an estimated 3-year MACEs rate of 29%. The addition of RV-GLS significantly improved the prognostic accuracy in predicting MACEs with respect to the standard evaluation including LGE (areas under the curve from 0.71 [0.66–0.82] to 0.76 [0.66–0.86], p = 0.03). On competing risk analysis, RV-GLS showed a significant ability to reclassify overall both HF-related and life-threatening arrhythmia-related events, regardless of LV and RV ejection fraction.Conclusions: In NICM patients, RV-GLS showed a significant prognostic role in reclassifying the risk of MACEs, incremental with respect to standard evaluation with standard prognostic parameters.

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Hou, Xian, Xing Xiong, Xia Li, Jianhua Bi, Gaofeng Xu, Yining Wang et Shu Jiang. « Predictive value of cardiac magnetic resonance mechanical parameters for myocardial fibrosis in hypertrophic cardiomyopathy with preserved left ventricular ejection fraction ». Frontiers in Cardiovascular Medicine 9 (15 décembre 2022). http://dx.doi.org/10.3389/fcvm.2022.1062258.

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ObjectiveMyocardial fibrosis leads to systolic dysfunction in hypertrophic cardiomyopathy (HCM) patients. This study aims to investigate the relationship between cardiac magnetic resonance mechanical parameters for evaluating the left ventricular function in HCM with preserved left ventricular ejection fraction (LVEF ≥50%) and the association between myocardial fibrosis defined by late gadolinium enhancement (LGE).MethodsThis study was a retrospective analysis of CMR images of 93 patients with HCM with preserved ejection fraction (HCMpEF) and 96 controls diagnosed by cardiac magnetic resonance (CMR) at our hospital from July 2019 to January 2022. The myocardial contraction fraction (MCF) was calculated, and myocardial mechanical parameters, including global myocardial longitudinal strain (GLS), circumferential strain (GLS), and myocardial strain (GLS), were obtained by tissue tracking and LGE quantitative modules of dedicated software, respectively. The correlation between myocardial strain and LGE was analyzed, and a multivariate logistic regression model was developed to discuss the risk predictors of LGE.ResultsCompared to the control group, the left ventricular mechanical parameters GLS (−13.90 ± 3.80% versus −18.20 ± 2.10%, p < 0.001), GCS (−16.62 ± 3.50% versus −18.4 ± 2.69%, p < 0.001), GRS (28.99 ± 10.38% versus 33.02 ± 6.25%, p < 0.01), and MCF (64 ± 16% versus 99 ± 18%, p < 0.001) were found significantly lower in HCM group. Moreover, even in LGE-negative HCM patients, GLS (−16.3 ± 3.9%) and MCF (78 ± 19%) were significantly lower compared to the control group. Left ventricular GLS [OR = 1.61, (1.29, 2.02), p = 0.001] and MCF [OR = 0.90, (0.86, 0.94), p = 0.001] independently predicted myocardial late gadolinium enhancement (LGE).ConclusionIn participants of HCM with preserved ejection fraction, the early onset of reduced left ventricular GLS and MCF in patients with HCMpEF may provide new evidence for evaluating impaired myocardial systolic function. The reduction of myocardial mechanical indexes may reflect the presence and extent of myocardial fibrosis, and the more significant the reduction, the more severe the myocardial fibrosis; GLS and MCF may be ideal predictors for LGE.

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Bicho Augusto, J. A., S. Nordin, R. Kozor, R. Vijapurapu, K. Knott, U. Ramaswami, T. D. Geberhiwot et al. « P340Inflammatory cardiomyopathy in Fabry disease ». European Heart Journal 40, Supplement_1 (1 octobre 2019). http://dx.doi.org/10.1093/eurheartj/ehz747.0174.

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Abstract Background Fabry disease (FD) is an X-linked lysosomal storage disorder caused by mutations in α-galactosidase A. Cardiovascular magnetic resonance (CMR) has helped unveil the pathogenesis of Fabry cardiomyopathy: sphingolipid storage (low T1 mapping values), left ventricular hypertrophy (LVH) and myocardial fibrosis with late gadolinium enhancement (LGE) characteristically present in the basal inferolateral (BIFL) wall. Recent evidence has suggested that the LGE may be inflammation and oedema as part of this pathogenic process. Purpose To assess the presence of inflammation in patients with FD using T2 mapping (for oedema/inflammation) supported by blood troponin levels (showing myocyte death and by inference inflammation). Methods A multi-centre international study in gene positive FD patients using CMR and blood biomarkers. All participants underwent CMR at 1.5 T. Native T1 and T2 mapping were performed. The T1 mapping sequence was MOLLI with sampling scheme in seconds. LGE used a phase sensitive inversion recovery sequence. Global longitudinal 2D strain (GLS) values were obtained using feature tracking analysis. Blood high-sensitivity troponin T (hsTnT) was measured on the same day. Results 100 FD patients (age 43.8±1.3 years, 42% male) were included. 45% had LVH, 35% LGE. Low T1 mapping (normal <943ms) was found in 49% and 33% had high hsTnT values (normal <15ng/L). Mean T2 mapping values were 52.6±0.6ms in the BIFL wall and 49.5±0.3ms in the remote myocardium/septum (p<0.001, normal <53ms). T2 values in the BIFL wall were significantly higher among patients with LGE (58.2±6.1ms vs 49.2±3.1ms, p<0.001, Figure 1). In a per-segment analysis of 1600 segments, higher T2 values correlated positively with percentage of LGE per segment (r=0,262, p<0.001), T1 values (r=0,205, p<0.001), maximum wall thickness (r=0,253, p<0.001) and GLS values (r=0,212, p<0.001). HsTnT values were higher among patients with LGE (median of 31 vs 3ng/L in patients without LGE, p<0.001). There was a strong positive correlation between T2 values in the BIFL wall and ln(hsTnT) (r=0.776, p<0.001, Figure 2). The strongest predictor of increased hsTnT in multivariate analysis (age, sex, LVH, septum T1, T2 in the BIFL, GLS, LGE) was T2 in the BIFL wall (β=0.4, p=0.001). Conclusions Cardiac involvement in FD goes beyond storage (low T1 values). When LGE is present, this is almost always associated with a high T2 and troponin elevation supporting FD as a chronic inflammatory cardiomyopathy. Initial reports of LGE being fibrosis are too simplistic – LGE in FD appears to have a significant chronic inflammation/oedema component.

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Adamczak, D. M., A. Rogala, M. Antoniak et Z. Oko-Sarnowska. « 1228 New predictors of sudden cardiac death in hypertrophic cardiomyopathy ». European Heart Journal - Cardiovascular Imaging 21, Supplement_1 (1 janvier 2020). http://dx.doi.org/10.1093/ehjci/jez319.690.

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Abstract BACKGROUND Hypertrophic cardiomyopathy (HCM) is a heart disease characterized by hypertrophy of the left ventricular myocardium. HCM is the most common cause of sudden cardiac death (SCD) in young people and competitive athletes due to fatal ventricular arrhythmias. However, in most patients, HCM has a benign course. That is why it is of utmost importance to properly evaluate patients and identify those who would benefit from a cardioverter-defibrillator (ICD) implantation. The HCM SCD-Risk Calculator is a useful tool for estimating the risk of SCD. The parameters included in the model at evaluation are: age, maximum left ventricular (LV) wall thickness, left atrial (LA) dimension, maximum gradient in left ventricular outflow tract, family history of SCD, non-sustained ventricular tachycardia (nsVT) and unexplained syncope. Nevertheless, there is potential to improve and optimize the effectiveness of this tool in clinical practice. Therefore, the following new risk factors are proposed: LV global longitudinal strain (GLS), LV average strain (ASI) and LA volume index (LAVI). GLS and ASI are sensitive and noninvasive methods of assessing LV function. LAVI more accurately characterizes the size of the left atrium in comparison to the LA dimension. METHODS 252 HCM patients (aged 20-88 years, of which 49,6% were men) treated in our Department from 2005 to 2018, were examined. The follow-up period was 0-13 years (average: 3.8 years). SCD was defined as sudden cardiac arrest (SCA) or an appropriate ICD intervention. All patients underwent an echocardiographic examination. The medical and family histories were collected and ICD examinations were performed. RESULTS 76 patients underwent an ICD implantation during the follow-up period. 20 patients have reached an SCD end-point. 1 patient died due to SCA and 19 had an appropriate ICD intervention. There were statistically significant differences of GLS and ASI values between SCD and non-SCD groups; p = 0.026389 and p = 0.006208, respectively. The average GLS in the SCD group was -12.4% ± 3.4%, and -15.1% ± 3.5% in the non-SCD group. The average ASI values were -9.9% ± 3.8% and -12.4% ± 3.5%, respectively. There was a statistically significant difference between LAVI values in SCD and non-SCD groups; p = 0.005343. The median LAVI value in the SCD group was 45.7 ml/m2 and 37.6 ml/m2 in the non-SCD group. The ROC curves showed the following cut-off points for GLS, ASI and LAVI: -13.8%, -13.7% and 41 ml/m2, respectively. Cox’s proportional hazards model for the parameters used in the Calculator was at the borderline of significance; p = 0.04385. The model with new variables (GLS and LAVI instead of LA dimension) was significant; p = 0.00094. The important factors were LAVI; p = 0.000075 and nsVT; p = 0.012267. CONCLUSIONS The proposed new SCD risk factors were statistically significant in the study population and should be taken into account when considering ICD implantation.

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Cvijic, M., J. Ambrozic, M. Bervar, T. Podlesnikar et J. Toplisek. « Left ventricular strain analysis-the importance of being expert ». European Heart Journal - Cardiovascular Imaging 23, Supplement_1 (1 février 2022). http://dx.doi.org/10.1093/ehjci/jeab289.090.

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Abstract Funding Acknowledgements Type of funding sources: None. OnBehalf - Background Myocardial strain imaging using speckle-tracking echocardiography is widely used in both research and clinics. Left ventricular global longitudinal strain (GLS) has proven to be a reproducible and useful tool in clinical practice. However, data about the variability in global and segmental strain among novice are limited. Purpose The aim of this study was to evaluate how the variability of strain measurements depends on the experience of the physician performing the analysis. Furthermore, we tried to assess how image quality and presence of pathology influence the diagnostic performance of the analysis. Methods Twenty novice (no or limited experiences with strain analysis) and 5 experts analysed offline 3 cases: a healthy adult and a patient with ischemic cardiomyopathy, both with high image quality, and a healthy adult with suboptimal image quality (insufficient tracking in two segments). Frame rates were 65, 51, and 70 fps, respectively. Left ventricular GLS and segmental longitudinal peak systolic strain were quantified using the automated function imaging protocol from vendor-specific offline analysis software. The absolute difference in GLS and segmental strain between each novice readers and experts was calculated. Mean strain measurements from the experts were used as a comparator. Results Absolute values of GLS ranged from -13.6% to -20.1% in the novice group, while GLS ranged from -15.6% to -18.8% in the expert group. The absolute difference in GLS was significantly higher in the novice group compared to the expert group (P < 0.001). Absolute differences in GLS varied significantly among cases, with low variability in healthy adult with high image quality (Panel A) and with significantly higher variability between novices and experts in case with suboptimal image quality and ischemic cardiomyopathy (Panel B-C). The absolute differences in segmental longitudinal peak systolic strain were up to 11.9% strain unit in novice group and up to 6,8% strain unit in experts (P < 0.001 between groups). In novice group, highest absolute differences in segmental strain were observed in the region with suboptimal tracking and in infarct region in patient with ischemic cardiomyopathy (Panel D-E). Conclusion Left ventricular strain analysis by a reader with no or limited experiences severely affects the diagnostic potential of this method. Significant variability in strain measurements should be considered especially in cases with suboptimal image quality and in cases with regional left ventricular pathology. Abstract Figure.

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Asad, Zain Ul Abideen, Brian Kliewer, Tiffany F. Mao, Isma N. Javed, Abdul Ghani Iqbal, Ali Jafry, Khawaja Akhtar, Khaled Elkholey, Phuong E. Ngo et Stavros Stavrakis. « Abstract 16694 : Left Ventricular Global Longitudinal Strain Predicts Ventricular Arrhythmias in Patients With Implanted Cardiac Devices ». Circulation 142, Suppl_3 (17 novembre 2020). http://dx.doi.org/10.1161/circ.142.suppl_3.16694.

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Introduction: Abnormal left ventricular ejection fraction (LVEF) is the traditional parameter used to assess the risk of sudden cardiac death (SCD), but most SCD events occur in patients with LVEF >40%. Hypothesis: We hypothesized that global longitudinal strain (GLS) can predict SCD in patients with heart failure and implantable cardiac devices. Methods: This was a retrospective cohort study. Device interrogation and chart review was done for demographic, clinical and echocardiographic characteristics and assessment of outcomes; ventricular tachycardia (VT) or ventricular fibrillation (VF), all-cause mortality, cardiac hospitalizations, non-sustained VT and new atrial fibrillation (AF). Cox-regression analysis was performed for the association between GLS, other clinical and echocardiographic parameters and outcomes. Results: A total of 180 patients were included with males 176 (98%), HFrEF (LVEF<40%) 58 (33%), HFmEF (LVEF 40-50%) 37 (21%), HFpEF 83 (46%), ischemic cardiomyopathy 78 (43%) and non-ischemic cardiomyopathy 39 (22%). Over a median follow up of 31 months, 29 (16%) developed sustained VT/VF, 33 (18%) died, 55 (31%) had cardiac hospitalization, 74 (41%) had non-sustained VT and 25 (14%) developed new AF. Abnormal GLS (≥-17%) predicted VT/VF (HR=4.0, 95% CI 1.2 - 13.3, p=0.02) and mortality (HR=4.2, 95% CI 1.5 - 11.9, p=0.008) in the entire population. Notably, in the HFpEF group, abnormal GLS was the only predictor of mortality (HR=3.5, 95% CI 1.1 - 10.8, p=0.02; Figure 1). Conclusions: Abnormal GLS is a predictor of ventricular arrhythmias and mortality in patients with heart failure. In patients with HFpEF, GLS may be used for risk stratification upon further validation in larger studies.

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Ikeda, M., Y. Kajikawa, M. Hirota et A. Ueda. « P1547 Left ventricular papillary muscle strain as an indicator of hypertrophic cardiomyopathy ». European Heart Journal - Cardiovascular Imaging 21, Supplement_1 (1 janvier 2020). http://dx.doi.org/10.1093/ehjci/jez319.968.

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Abstract Background Although recognized as part of the mitral valve complex, few studies have assessed the left ventricular papillary muscle. We confirmed during autopsy that papillary muscle consists of longitudinal aligned muscle fibers, and that the papillary muscle originated from the left ventricular oblique muscle. Therefore, papillary muscle contraction was considered only in the longitudinal direction. Purpose We previously reported that left ventricular papillary muscle strain (LV-PMS) in 100 patients without organic heart disease was correlated with multiple left ventricular function assessment parameters. This study aimed to determine whether left ventricular papillary muscle strain (LV-PMS) in patients with hypertrophic cardiomyopathy (HCM) is correlated with left ventricular function parameters as in non-HCM patients. Methods We measured left ventricular papillary muscle strain (LV-PMS) between two points on papillary muscles except where chordae adhere and the left ventricular wall, and compared values between patients without organic heart disease and with hypertrophic cardiomyopathy (HCM). Among 1,344 patients who were assessed by echocardiography at our hospital between January and June 2018, we selected 42 (mean age, 68.9 ± 17.4 years; male, 67%) who did not have coronary heart disease and in whom left ventricular papillary muscle contraction strain (LV-PMS) could be determined. Obvious anterior and posterior papillary muscles were evaluated. We also analyzed age, EF, e’, s’, E/e’, E/A, left atrial volume index (LAV-I) and global longitudinal strain (GLS) as possibly relevant factors. Results Among the 42 patients, 22 (52%) and 17 (40%) had hypertension and HCM, respectively. We measured the strength of linear associations among paired variables (LV-PMS, age, EF, e’, s’, E/e’, E/A, LAV-I and GLS) using Pearson product-moment correlation coefficients. Age (r = 0.64), e’ (r = -0.76), s’ (r = -0.61), LAV-I (r = 0.61) and GLS (r = 0.57; all p < 0.001), as well as E/e’ (r = 0.44, p < 0.05) significantly correlated in patients without HCM, whereas only GLS correlated in patients with HCM (r = 0.723, p < 0.001). One-way analyses of variance showed that LV-PMS values significantly differed only among patients without HCM when categorized according to age < 50, ≥ 50 < 75 and > 75 years (p < 0.001), whereas these values significantly differed in all patients (p < 0.05) when categorized according to GLS < -20%, ≥ -20 to < -15% and > -15%. Conclusions We found that LV-PMS correlated with five factors including age in patients without HCM, but only with GLS in those with HCM. Despite the small study cohort, we considered that LV-PMS and GLS would be useful for evaluating left ventricular function in patients with HCM.

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Cui, Cunying, Yanan Li, Yuanyuan Liu, Danqing Huang, Yanbin Hu, Ying Wang, Lijia Ma et Lin Liu. « Association Between Echocardiographic Non-invasive Myocardial Work Indices and Myocardial Fibrosis in Patients With Dilated Cardiomyopathy ». Frontiers in Cardiovascular Medicine 8 (16 août 2021). http://dx.doi.org/10.3389/fcvm.2021.704251.

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Objectives: To analyze the association between global myocardial work indices evaluated by non-invasive left ventricular (LV) pressure-strain loop (PSL) and LV myocardial fibrosis in patients with dilated cardiomyopathy (DCM).Methods: A total of 57 patients with DCM were included in this prospective study. Global work index (GWI), global constructive work (GCW), global wasted work (GWW), global work efficiency (GWE) and global longitudinal strain (GLS) were measured using LVPSL. LV volumes and LV ejection fraction (LVEF) were evaluated using cardiac magnetic resonance imaging (CMRI), LV myocardial fibrosis was estimated at CMRI by qualitative assessment of late gadolinium enhancement (LGE). According to the CMRI, the studied population was divided into two groups, namely: patients without LGE (LGE-) and patients with LGE (LGE+).Results: The LGE+ group presented with increased age, LV end systolic volume (LVESV) index and reduced GWI, GCW, GWE, GLS, CMRI-derived LVEF (LVEFCMRI), the differences between the two groups were statistically significant (P < 0.05). After correcting for age and LVESV index, LVEFCMRI, GLS, GWI, GCW, and GWE retained independent associations with LV myocardial fibrosis. According to receiver operating characteristics (ROC) analysis, LVEFCMRI, and GCW showed larger AUC and higher accuracy, sensitivity, and specificity than GLS, the accuracy of predicting LV myocardial fibrosis ranged from high to low as: LVEFCMRI, GCW, GWE, GWI, and GLS.Conclusions: LVEFCMRI, GWI, GCW, GWE, and GLS remained significant predictors of LV myocardial fibrosis. LVEFCMRI, and GCW appeared to better predict LV myocardial fibrosis compared with GLS.

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