Effects of pacing the right ventricular outflow tract on the cardiac hemodynamic and the ventricular activation sequence
10.3760/cma.j.issn.1008-1372.2011.07.016
- VernacularTitle:右室流出道起搏对患者心脏血流动力学和心室激动顺序的影响
- Author:
Guofeng WANG
;
Bo YU
- Publication Type:Journal Article
- Keywords:
Cardiac pacing,artificial/MT;
Heart ventricles;
Hemodynamics;
Atrioventricular block/TH
- From:
Journal of Chinese Physician
2011;13(7):919-922
- CountryChina
- Language:Chinese
-
Abstract:
Objectives To compare the hemodynamic effects and ventricular activation sequence associated with the respective pacing of the right ventricular outflow tract (RVOT) and right ventricular apex (RVA). Methods 79 patients with complete atrioventricular block (AVB) or sick sinus syndrome (SSS)to undergo permanent ventricular stimulation either at the right ventricular apex (RVA) (n = 38) or right ventricular outflow tract (RVOT) (n =41) were selected. The left ventricular ejection fraction (LVEF),cardiac index (CI), mitral E/A ratio and QRS duration were recorded before implantation of pacemaker and 6 or 12 months after implantation. Results There were no significant differences in CI , LVEF, E/A between RVOT and RVA pacing(P ＞0. 05). Compared with normal sinus rhythm, the QRS duration was significantly lengthened when pacing at RVOT or RVA (P ＜0. 05). RVA pacing was significantly longer than RVOT in QRS duration (P ＜ 0. 05). Conclusions There was no significant difference with the hemodynamic effect between RVOT and RVA pacing in subject with normal heart function. Compared with RVA pacing, RVOT pacing remained relatively normal ventricular activation sequence.
