右室流出道间隔部与心尖部起搏对心功能的影响

目的了解右室流出道间隔部起搏和右室心尖部起搏参数的差异及对心功能的影响。方法65例安装DDD起搏器的患者随机分为右室心尖部（RVA）与右室流出道间隔部（RVS）起搏进行置入时及术后3个月起搏参数、左室射血分数的分析。结果两组基线资料无显著差异，术后15min及3个月两组的起搏阂值、感知、阻抗均无差异，术后3个月右室流出道间隔部组左室射血分数显著高于右室心尖部组（0．57±0．04vs0．50±0．03，p〈0．05）。结论右室流出道间隔部起搏安全可行，且对心功能的影响优于右室心尖部起搏。

The effect of the pacing between right ventricular outflow septum and right ventricular apical on the heart function

Objective To investigate the active fixation lead pacing parameter difference and effect on cardiac funtion of regular right ventricular septum （RVS） pacing and right ventricular apex （RVA） pacing. Methods 65 patients with DDD pacemarker are divideded into RVS and RVA group,compare the pacing parameter and right ventricular ejection fraction when leads are planted and three month after planting. Results All patients＇ operation were successful. The immediate pacing threshold affter active leads are planted of RVS pacing dropped than RVA pacing, but achived the basic requirements of cardiac pacing-there is no significant difference in the pacing threshold, sensation and impedance between 15min after operation and 30min after operation.LVEF of RVS group is significantly higher than RVA group three month after opration. Conclusion the usage of active fixation lead in patients with RVS pacing is feasible and steady, the cardiac function are significantly different between RVS pacing group and RVA pacing group.