Thematische Bibliographien / Ventricular synchronization

Auswahl der wissenschaftlichen Literatur zum Thema „Ventricular synchronization“

Autor: Grafiati

Veröffentlicht am 7. Juli 2024

Zuletzt aktualisiert am 7. Juli 2024

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Zeitschriftenartikel zum Thema "Ventricular synchronization"

Takemoto, Yoshio, Toshiyuki Osaka, Eriko Yokoyama, Masahide Harada, Michio Takikawa, Tomoyuki Suzuki, Susumu Takeuchi, Atsushi Ito und Itsuo Kodama. „Right ventricular midseptal pacing preserves left ventricular mechanical synchronization“. Heart Rhythm 2, Nr. 5 (Mai 2005): S165. http://dx.doi.org/10.1016/j.hrthm.2005.02.516.

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Arias, Miguel A., Rafael Peinado und José L. Merino. „Better ventricular synchronization via an accessory pathway“. EP Europace 8, Nr. 8 (01.08.2006): 616–17. http://dx.doi.org/10.1093/europace/eul076.

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Agadi, Smitha G., Helen Lonergan-Thomas, Sharon Brennan, Pamela Cianci, Mark Slaughter und Marc Silver. „IMPACT OF LEFT VENTRICULAR ASSIST DEVICE DESTINATION THERAPY ON VENTRICULAR RE-SYNCHRONIZATION“. Chest 128, Nr. 4 (Oktober 2005): 281S. http://dx.doi.org/10.1378/chest.128.4_meetingabstracts.281s-b.

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Wu, Shengjie, Parikshit S. Sharma und Weijian Huang. „Novel left ventricular cardiac synchronization: left ventricular septal pacing or left bundle branch pacing?“ EP Europace 22, Supplement_2 (Dezember 2020): ii10—ii18. http://dx.doi.org/10.1093/europace/euaa297.

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Abstract It is well recognized that a high burden of right ventricular pacing results in deleterious clinical outcomes over the long term. His bundle pacing can achieve optimal ventricular synchronization; however, relatively high pacing thresholds, low R-wave amplitudes, and the long-term performance have been concerns. Recently, left ventricular (LV) septal endocardium pacing (LVSP) has demonstrated improved acute haemodynamics. Another novel technique of intraseptal left bundle branch pacing (LBBP) via transvenous approach has been adopted rapidly and has demonstrated its feasibility and effectiveness. This article reviews the clinical application and differences between LVSP and LBBP. Compared with LVSP, LBBP has strict criteria for left conduction system capture and lead location. In addition to LV septal capture it also stimulates the proximal left bundle branch, resulting in rapid and physiological LV activation. With a uniformity and standardization of the implant procedure and definitions, it may be possible to achieve widespread application of this form of physiological pacing.

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Ly, Cheng, und Seth H. Weinberg. „Automaticity in ventricular myocyte cell pairs with ephaptic and gap junction coupling“. Chaos: An Interdisciplinary Journal of Nonlinear Science 32, Nr. 3 (März 2022): 033123. http://dx.doi.org/10.1063/5.0085291.

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Spontaneous electrical activity, or automaticity, in the heart is required for normal physiological function. However, irregular automaticity, in particular, originating from the ventricles, can trigger life-threatening cardiac arrhythmias. Thus, understanding mechanisms of automaticity and synchronization is critical. Recent work has proposed that excitable cells coupled via a shared narrow extracellular cleft can mediate coupling, i.e., ephaptic coupling, that promotes automaticity in cell pairs. However, the dynamics of these coupled cells incorporating both ephaptic and gap junction coupling has not been explored. Here, we show that automaticity and synchronization robustly emerges via a Hopf bifurcation from either (i) increasing the fraction of inward rectifying potassium channels (carrying the [Formula: see text] current) at the junctional membrane or (ii) by decreasing the cleft volume. Furthermore, we explore how heterogeneity in the fraction of potassium channels between coupled cells can produce automaticity of both cells or neither cell, or more rarely in only one cell (i.e., automaticity without synchronization). Interestingly, gap junction coupling generally has minor effects, with only slight changes in regions of parameter space of automaticity. This work provides insight into potentially new mechanisms that promote spontaneous activity and, thus, triggers for arrhythmias in ventricular tissue.

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Ahmed, Walid, Wael Samy, Osama Tayeh, Noha Behairy und Alia Abd El Fattah. „Left ventricular scar impact on left ventricular synchronization parameters and outcomes of cardiac resynchronization therapy“. International Journal of Cardiology 222 (November 2016): 665–70. http://dx.doi.org/10.1016/j.ijcard.2016.07.158.

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Biner, Simon, Asim Rafique, Arik Wolak, Kirsten Tolstrup und Robert J. Siegel. „Visual Assessment of Left Ventricular Dyssynchrony Using Tissue Synchronization Imaging“. Cardiology 114, Nr. 2 (2009): 90–99. http://dx.doi.org/10.1159/000217742.

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ZHANG, Ye, Zhi-An LI, Yi-Hua HE, Hai-Bo ZHANG und Xu MENG. „Utility of echocardiographic tissue synchronization imaging to redirect left ventricular epicardial lead placement for cardiac resynchronization therapy“. Chinese Medical Journal 126, Nr. 22 (20.11.2013): 4222–26. http://dx.doi.org/10.3760/cma.j.issn.0366-6999.20130606.

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Background Cardiac resynchronization therapy (CRT) with biventricular pacing has demonstrated cardiac function improvement for treating congestive heart failure (HF). It has been documented that the placement of the left ventricular lead at the longest contraction delay segment has the optimal CRT benefit. This study described follow-up to surgical techniques for CRT as a viable alternative for patients with heart failure. Methods Between April 2007 and June 2012, a total of 14 consecutive heart failure patients with New York Heart Association (NYHA) Class III-IV underwent left ventricular epicardial lead placements via surgical approach. There were eight males and six females, aged 36 to 79 years ((59.6±9.2) years). The mean left ventricular ejection fraction (LVEF) was (33.6±7.4)%. All patients were treated with left ventricular systolic dyssynchrony and underwent left ventricular epicardial lead placements via a surgical approach. Tissue Doppler imaging (TDI) and intraoperative transesophageal echocardiography were used to assess changes in left heart function and dyssynchronic parameters. Also, echo was used to select the best site for left ventricular epicardial lead placement. Results Left ventricular epicardial leads were successfully implanted in the posterior or lateral epicardial wall without serious complications in all patients. All patients had reduction in NYHA score from III-IV preoperatively to II-III postoperatively. The left ventricular end-diastolic diameter (LVEDD) decreased from (67.9±12.7) mm to (61.2±7.1) mm (P<0.05), and LVEF increased from (33.6±7.4)% to (42.2±8.8)% (P<0.05). Left ventricular intraventricular dyssynchrony index decreased from (148.4±31.6) ms to (57.3±23.8) ms (P<0.05). Conclusions Minimally invasive surgical placement of the left ventricular epicardial lead is feasible, safe, and efficient. TDI can guide the epicardial lead placement to the ideal target location.

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Kaufmann, Michael R., Matthew S. McKillop, Thomas A. Burkart, Mark Panna, Jamie B. Conti und William M. Miles. „Iatrogenic Ventricular Fibrillation after Direct-Current Cardioversion of Preexcited Atrial Fibrillation Caused by Inadvertent T-Wave Synchronization“. Texas Heart Institute Journal 45, Nr. 1 (01.02.2018): 39–41. http://dx.doi.org/10.14503/thij-16-6162.

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Direct-current cardioversion is an important means of managing arrhythmias. During treatment, carefully synchronizing energy delivery to the QRS complex is necessary to avoid ventricular fibrillation caused by a shock during the vulnerable period of ventricular repolarization, that is, a shock on the T wave. The presence of an accessory pathway and ventricular preexcitation can lead to difficulty in distinguishing the QRS complex from the T wave because of bizarre, wide, irregular QRS complexes and prominent repolarization. We present the cases of 2 patients who had iatrogenic ventricular fibrillation from inappropriate T-wave synchronization during direct-current cardioversion of preexcited atrial fibrillation. Our experience shows that rapidly recognizing the iatrogenic cause of VF and immediate treatment with unsynchronized defibrillation can prevent adverse clinical outcomes.

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Hirayama, Yasutaka, Tatsuya Saito, Masaru Tsukamoto, Nobuyuki Sato, Yuichiro Kawamura und Naoyuki Hasebe. „Right Ventricular Outflow Tract Pacing Reveals a Different Left Ventricular Synchronization According to the Degree of the Atrio-Ventricular Conductivity“. Journal of Arrhythmia 27, Supplement (2011): OP64_6. http://dx.doi.org/10.4020/jhrs.27.op64_6.

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Dissertationen zum Thema "Ventricular synchronization"

Chaumont, Corentin. „Stimulatiοn permanente du système de cοnductiοn cardiaque : faisabilité, impact électrοmécanique et applicatiοns cliniques hοrs du champ de la resynchrοnisatiοn cardiaque“. Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMR010.

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La stimulation ventriculaire droite conventionnelle induit une désynchronisation inter et intraventriculaire gauche, majorant le risque d’insuffisance cardiaque au long cours. Les techniques de stimulation permanente du système de conduction, stimulation Hisienne ou stimulation de l’aire de la branche gauche (SABG), visent à préserver une activation ventriculaire physiologique. Nous avons démontré la faisabilité et la sécurité de la stimulation du système de conduction dans des centres débutant leur expérience avec ces techniques. Une enquête menée à l’échelle nationale a permis de confirmer une diminution de l’utilisation de la stimulation Hisienne aux dépens de la SABG. Nous nous sommes intéressés à l’impact électromécanique et avons démontré que la SABG permettait un maintien de la synchronisation inter et intraventriculaire gauche chez les patients ayant des QRS spontanés fins. En cas d’arythmie atriale non contrôlée, la stimulation Hisienne combinée à l’ablation du nœud atrio-ventriculaire (NAV) était faisable et efficace, mais associée à des difficultés techniques. Dans une seconde étude comparant la stimulation Hisienne et la SABG dans cette indication, la SABG était associée à une diminution du taux de reconduction atrio-ventriculaire sans compromettre l’efficacité clinique. La stimulation du système de conduction constitue également une approche intéressante en cas de troubles de la conduction, notamment chez les patients ayant un taux attendu de stimulation ventriculaire élevé : un score a ainsi été développé pour prédire un taux de stimulation ventriculaire ≥ 40% chez les patients implantés d’un stimulateur cardiaque en post-TAVI. Enfin, nous nous sommes intéressés à une indication future potentielle : la régularisation de la cadence ventriculaire chez les patients en fibrillation atriale (FA) permanente atteints d’insuffisance cardiaque à FEVG préservée (IC-FEp). Nous avons développé un paramètre Holter permettant de mesurer l’irrégularité cycle à cycle en FA. Un modèle expérimental de cœur de rat isolé, perfusé et stimulé a été mis en place pour étudier l’impact hémodynamique de l’irrégularité ventriculaire. Enfin, nous avons proposé une étude randomisée visant à comparer traitement médicamenteux versus une stratégie de régularisation ventriculaire par ablation du NAV et stimulation du système de conduction, chez les patients IC-FEp en FA permanente bien contrôlée
Right ventricular pacing induces inter- and intraventricular dyssynchrony, increasing the long-term risk of heart failure. Permanent conduction system pacing (CSP), either His bundle pacing (HBP) or left bundle branch area pacing (LBBAP), aims to preserve physiological ventricular activation. We have demonstrated the feasibility and safety of CSP in centers initiating their experience with these techniques. A nationwide survey confirmed a decrease in the use of HBP in favor of LBBAP. We investigated the electromechanical impact and demonstrated that LBBAP preserved interventricular and left intraventricular mechanical synchrony in patients with spontaneous narrow QRS. We then focused on the use of these techniques combined with atrioventricular node ablation (AVNA) for non-controlled atrial arrhythmia: HBP was feasible and effective, despite significant technical challenges. In another study comparing HBP and LBBAP in the “ablate and pace” strategy, LBBAP was associated with a reduction in symptomatic AV node reconduction rate without compromising clinical efficacy. CSP is also of major interest in cases of AV conduction disease, especially in patients with an expected high ventricular pacing burden: a score was developed to predict a ventricular pacing rate ≥ 40% in post-TAVI patients undergoing pacemaker implantation. Finally, we explored a potential future indication of CSP: ventricular regularization in patients with permanent atrial fibrillation (AF) and heart failure with preserved ejection fraction (HFpEF). We developed a new Holter parameter to measure beat-to-beat irregularity during AF. An experimental model of isolated, perfused, and stimulated rat heart was established to study the hemodynamic impact of ventricular irregularity. Finally, we proposed a randomized study to compare medical treatment versus ventricular rate regularization (CSP + AVNA) in patients with well-controlled permanent AF and HFpEF

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Buchteile zum Thema "Ventricular synchronization"

Borasteros, C. „Clinical Issues in the Ventricular Synchronization Therapy of Heart Failure“. In New Advances in Heart Failure and Atrial Fibrillation, 421–28. Milano: Springer Milan, 2003. http://dx.doi.org/10.1007/978-88-470-2087-0_64.

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Manoach, Mordechai, Dalia Varon und Mordechai Erez. „The role of catecholamines on intercellular coupling, myocardial cell synchronization and self ventricular defibrillation“. In Cellular Interactions in Cardiac Pathophysiology, 181–85. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4615-2005-4_23.

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Guruswamy, Jayakar, und Snigdha Parikh. „Ventricular Synchronization“. In Advanced Anesthesia Review, herausgegeben von Alaa Abd-Elsayed, 325—C123.S2. Oxford University PressNew York, 2023. http://dx.doi.org/10.1093/med/9780197584521.003.0122.

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Abstract Approximately 6.5 million adults in the United States have heart failure, which contributed to approximately one in eight deaths in the year 2017 per the Centers for Disease Control and Prevention. Despite advancements in pharmacological therapy available for heart failure and improvements in outcomes, there is still a significant proportion of patients hospitalized with systolic heart failure. Device-based therapies are the latest development in the field of heart failure management. These devices are commonly encountered by anesthesiologists because of the large prevalence of heart failure in the United States. They aim to target patients with systolic dysfunction with dyssynchronous ventricular contraction.

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Konferenzberichte zum Thema "Ventricular synchronization"

Mukhamiev, R. R., O. A. Mukhametzyanov, T. F. Shcherbakova und S. S. Sedov. „Powerline Interference’s Filtering Influence on Ventricular Late Potentials“. In 2022 Systems of Signal Synchronization, Generating and Processing in Telecommunications (SYNCHROINFO). IEEE, 2022. http://dx.doi.org/10.1109/synchroinfo55067.2022.9840931.

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Hernandez, Heidy, Gyo-Seung Hwang und Shien-Fong Lin. „Synchronization of ventricular fibrillation with electrical pacing guided by optical signals: comparison of pacing locations“. In Biomedical Optics 2006, herausgegeben von Nikiforos Kollias, Haishan Zeng, Bernard Choi, Reza S. Malek, Brian J. Wong, Justus F. R. Ilgner, Eugene A. Trowers et al. SPIE, 2006. http://dx.doi.org/10.1117/12.659539.

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Shiraishi, Y., T. Yambe, Y. Saijo, F. Sato, A. Tanaka, M. Yoshizawa, T. K. Sugai et al. „Assessment of synchronization measures for effective ventricular support by using the shape memory alloy fibred artificial myocardium in goats“. In 2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2009. http://dx.doi.org/10.1109/iembs.2009.5333627.

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Conti, P., L. Banetta, A. Ficola und F. Magnino. „A Cardio-Synchronized Injection System“. In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-2637.

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Abstract The main limit in today’s infusion systems is that they can yield high liquid volumes but at low velocity (gravity systems) or at some higher velocity, but with constant mass/velocity ratio (peristaltic systems). In any case, the blood injection is obtained without any synchronization with fast ventricular diastole nor any attempt is made to enhance blood circulation in the venous vessels (which can be drastically slowed down by the pressure drop in the circulatory system); this can induce non physiologic pressure rises in the central venous system. A prototypical cardio-synchronized injection system has been developed in order to avoid the negative effects of continuos high rate infusion, to allow a mass injection independent from the velocity, and to induce a pumping effect in the venous vessels. The system has been designed to reduce the impact on the central venous pressure and to allow lower mass injection at higher velocities.

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