Littérature scientifique sur le sujet « Cardiomyopathy, GLS »
Créez une référence correcte selon les styles APA, MLA, Chicago, Harvard et plusieurs autres
Consultez les listes thématiques d’articles de revues, de livres, de thèses, de rapports de conférences et d’autres sources académiques sur le sujet « Cardiomyopathy, GLS ».
À côté de chaque source dans la liste de références il y a un bouton « Ajouter à la bibliographie ». Cliquez sur ce bouton, et nous générerons automatiquement la référence bibliographique pour la source choisie selon votre style de citation préféré : APA, MLA, Harvard, Vancouver, Chicago, etc.
Vous pouvez aussi télécharger le texte intégral de la publication scolaire au format pdf et consulter son résumé en ligne lorsque ces informations sont inclues dans les métadonnées.
Articles de revues sur le sujet "Cardiomyopathy, GLS"
1
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, no 17 (19 avril 2020) : 1876–86. http://dx.doi.org/10.1177/2047487320916591.
Texte intégralRésumé :
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.
2
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, no 15_suppl (20 mai 2019) : e23070-e23070. http://dx.doi.org/10.1200/jco.2019.37.15_suppl.e23070.
Texte intégralRésumé :
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.
3
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, no 2 (22 février 2021) : 374. http://dx.doi.org/10.3390/diagnostics11020374.
Texte intégralRésumé :
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.
4
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, no 3S (14 septembre 2022) : 5034. http://dx.doi.org/10.15829/1560-4071-2022-5034.
Texte intégralRésumé :
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.
5
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, no 10 (30 octobre 2022) : 35–41. http://dx.doi.org/10.18087/cardio.2022.10.n2034.
Texte intégralRésumé :
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.
6
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, no 12 (24 novembre 2021) : 2188. http://dx.doi.org/10.3390/diagnostics11122188.
Texte intégralRésumé :
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.
7
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, no 8 (15 février 2021) : 855–65. http://dx.doi.org/10.1093/ehjci/jeab021.
Texte intégralRésumé :
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.
8
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, no 17 (12 août 2019) : 2796–801. http://dx.doi.org/10.3889/oamjms.2019.655.
Texte intégralRésumé :
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.
9
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, no 5 (28 février 2022) : 1332. http://dx.doi.org/10.3390/jcm11051332.
Texte intégralRésumé :
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.
10
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, no 11 (25 août 2021) : 4622. http://dx.doi.org/10.15829/1560-4071-2021-4622.
Texte intégralRésumé :
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.
Thèses sur le sujet "Cardiomyopathy, GLS"
1
Whyte, Gregory P. « Cardiac structure, and exercise gas exchange kinetics in elite multi-disciplinary athletes and hypertrophic cardiomyopathy patients ». Thesis, University of Wolverhampton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263329.
Texte intégralLivres sur le sujet "Cardiomyopathy, GLS"
1
Whyte, Gregory P. Cardiac structure, and exercise gas exchange kinetics in elite multi-disciplinary athletes and hypertrophic cardiomyopathy patients. Wolverhampton : University of Wolverhampton, 1998.
Trouver le texte intégralChapitres de livres sur le sujet "Cardiomyopathy, GLS"
1
Charron, Philippe, et Carole Maupain. « Genetics of cardiomyopathies : hypertrophic cardiomyopathy ». Dans ESC CardioMed, 688–91. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780198784906.003.0154.
Texte intégralRésumé :
Hypertrophic cardiomyopathy is characterized by the presence of increased left ventricular wall thickness that is not solely explained by abnormal loading conditions (such as hypertension or valvular disease). Hypertrophic cardiomyopathy is a genetic disease, usually with an autosomal dominant inheritance. About 35–60% of patients with hypertrophic cardiomyopathy carry a pathogenic mutation in sarcomeric protein genes. Most mutations are observed in genes encoding beta-myosin heavy chain (MYH7), cardiac myosin binding protein C (MYBPC3), or cardiac troponin T (TNNT2). Non-sarcomeric genetic causes exist, especially in children (Pompe disease, Noonan syndrome, or Friedreich ataxia). In adults, non-sarcomeric genetic causes include metabolic storage diseases such as Danon disease (LAMP2 gene), Fabry disease (GLA gene), left ventricular hypertrophy associated with Wolff–Parkinson–White syndrome (PRKAG2 gene), familial amyloidosis (TTR gene), and mitochondrial cardiomyopathies.
2
Diaz Soto, Juan C., Justin A. Fried et A. Reshad Garan. « Critical Concepts in Extracorporeal Life Support for Cardiogenic Shock ». Dans Cardiothoracic Critical Care, 231–40. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780190082482.003.0024.
Texte intégralRésumé :
This chapter examines venoarterial extracorporeal membrane oxygenation (VA-ECMO), also known as extracorporeal life support, which is increasingly used to support patients with refractory cardiogenic shock and cardiopulmonary collapse. VA-ECMO is a simplified form of cardiopulmonary bypass which provides both circulatory support and gas exchange. The underlying etiology of the cardiogenic shock is critical to determine the optimal use of this therapy and prognosis. Primary ischemic etiologies such as acute myocardial infarction and non-ischemic etiologies such as fulminant myocarditis, peripartum cardiomyopathy, decompensated pulmonary hypertension, and primary graft failure following cardiac transplant causing cardiogenic shock are frequent indications for VA-ECMO and represent a heterogenous postoperative patient population. However, despite VA-ECMO's broad applicability, a number of contraindications exist: severe, irreversible, non-cardiac organ failure limiting survival; irreversible cardiac failure if transplantation or long-term ventricular assist device will not be considered; severe aortic insufficiency; and aortic dissection. Understanding the potential complications and the hemodynamic consequences of VA-ECMO support is critical to recognize and mitigate some of the risks associated with this therapy and to avoid some common pitfalls with its use. The chapter then looks at the management of patients on VA-ECMO.
Actes de conférences sur le sujet "Cardiomyopathy, GLS"
1
Aldali, Sara Haitham, et Sownd Sankaralingam. « Induction of Glyoxalase 1 to prevent Methylglyoxal-Induced Insulin Resistance in Cardiomyocytes ». Dans Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0230.
Texte intégralRésumé :
Background: Type 2 Diabetes mellitus is characterized by hyperglycemia and insulin resistance. Methylglyoxal (MG) a highly reactive dicarbonyl compound is also increased in diabetes. MG is detoxified by glyoxalase 1 (Glo-1) enzyme using reduced glutathione (GSH) as a co-factor. MG has been shown to have deleterious effects on cardiovascular cells and impairs insulin signaling. Insulin resistance is associated with diabetic cardiomyopathy. Trans-resveratrol (tRES) and Hesperetin (HES) combination has been shown to increase Glo-1 and improve insulin signaling in obese patients. Aim(s): The aim of this study is to investigate whether tRES-HES combination prevents MG-induced cardiac insulin resistance and the underlying mechanisms in cardiomyocytes in culture. Methodology: (H9C2) rat cardiomyocytes were treated with MG (100 µM) for 24 hours in the presence or absence of tRES-HES (10 µM). Glo-1 activity was determined by the formation of S-D lactoylglutathione; protein expression of P-Akt and P-GSK3b was determined using Western blot. In some experiments, cells were stimulated with insulin (100 nM) for 10 minutes to test insulin sensitivity. Results: MG reduced Glo-1 activity by ~25%, blunted insulin-induced phosphorylation of Akt and Gsk3b and increased the expression of beta-myosin heavy chain by ~50% (a marker of cardiac dysfunction) significantly (P˂0.05) compared to untreated control group of cells. Co-administration of tRES-HES combination restored Glo1 activity, maintained insulin-induced phosphorylation of Akt and GSK3b and prevented the increase in beta myosin heavy chain significantly (P<0.05). Conclusion: Induction of Glo1 prevents MG-induced cardiac insulin resistance and the increase in marker of cardiac dysfunction. This strategy could be helpful in preventing cardiovascular complications associated with diabetes.