TY - CHAP U1 - Konferenzveröffentlichung A1 - Heinke, Matthias A1 - Dannberg, Gudrun A1 - Heinke, Tobias A1 - Kühnert, Helmut T1 - Ventricular desynchronization with electrical interventricular delay to left ventricular delay ratio in atrial fibrillation heart failure patients T2 - Biomedical Engineering / Biomedizinische Technik N2 - Cardiac resynchronization therapy is an established therapy for heart failure patients with sinus rhythm, reduced left ventricular ejection fraction and prolongation of QRS duration. The aim of the study was to evaluate ventricular desynchronization with electrical interventricular delay (IVD) to left ventricular delay (LVD) ratio in atrial fibrillation heart failure patients. IVD and LVD were measured by transesophageal posterior left ventricular ECG recording. In atrial fibrillation heart failure patients with prolonged QRS duration, the mean IVD-to-LVD-ratio was 0.84 +/- 0.42 with a range from 0.17 to 2.2 IVD-to-LVD-ratio. IVD-to-LVD-ratio correlated with QRS duration. IVD-to-LVD-ratio may be a useful parameter to evaluate electrical ventricular desynchronization in atrial fibrillation heart failure patients. KW - Herzkrankheit Y1 - 2014 SN - 0013-5585 (Print) SS - 0013-5585 (Print) SN - 1862-278X (Online) SS - 1862-278X (Online) U6 - https://dx.doi.org/10.1515/bmt-2014-5002 DO - https://dx.doi.org/10.1515/bmt-2014-5002 N1 - BMT 2014 - 48th DGBMT Annual Conference, October 8th-10th 2014, Hannover, Germany VL - 59 IS - S1 SP - S227 EP - S229 S1 - 3 PB - Walter de Gruyter CY - Berlin, Boston ER - TY - CHAP U1 - Konferenzveröffentlichung A1 - Heinke, Matthias A1 - Dannberg, Gudrun A1 - Solbrig, Olaf A1 - Querengässer, Jürgen A1 - Kühnert, Helmut T1 - Optimization of atrioventricular and interventricular pacing delay in biventricular pacing with different left ventricular electrode position T2 - Biomedical Engineering / Biomedizinische Technik N2 - Cardiac resynchronization therapy with atrioventricular and interventricular pacing delay optimized biventricular pacing is an established therapy for heart failure patients with sinus rhythm and reduced left ventricular ejection fraction. The aim of the study was to evaluate atrioventricular and interventricular pacing delay optimization in cardiac resynchroniza-tion therapy by transthoracic impedance cardiography in biventricular pacing with different left ventricular electrode po-sition. In biventricular pacing heart failure patients with lateral, posterolateral and anterolateral left ventricular electrode position, the mean optimal atrioventricular sening delay was 108.6 ± 20.3 ms and the mean optimal interventricular pac-ing delay -12.3 ± 25.9 ms. Transthoracic impedance cardiography may be a useful technique to optimize atrioventricular and interventricular pacing delay in biventricular pacing with different left ventricular electrode position. KW - Herzkrankheit Y1 - 2014 SN - 0013-5585 (Print) SS - 0013-5585 (Print) SN - 1862-278X (Online) SS - 1862-278X (Online) U6 - https://dx.doi.org/10.1515/bmt-2014-5002 DO - https://dx.doi.org/10.1515/bmt-2014-5002 N1 - BMT 2014 - 48th DGBMT Annual Conference, October 8th-10th 2014, Hannover, Germany VL - 59 IS - S1 SP - S230 EP - S232 S1 - 3 PB - Walter de Gruyter CY - Berlin, Boston ER -