主动电极和被动电极在右室不同部位起搏的对照研究

目的比较主动电极和被动电极在右室不同部位应用时的各种参数,探讨主动电极在右室流出道起搏的可行性及安全性。方法需安装起搏器的患者60例,随机采用主动电极右室流出道间隔部起搏(RVOTS)(主动电极组,n=30例)和被动电极右室心尖部起搏(被动电极组,n=30例),记录2组术中测试及术后随访期程控的各项参数。结果 2组手术均顺利完成,术中及随访期均无并发症出现。主动电极组电极植入即刻起搏阈值较被动电极组高(P0.05),而阻抗较被动电极组低(P0.05)。术后心电图,主动电极组心室起搏时QRS波时限较被动电极组窄(P0.05)。1个月、3个月及6个月程控各项参数差异无统计学意义(P0.05)。结论采取主动电极RVOTS起搏是安全可靠的。

Comparative study between active fixation electrode and passive fixation electrode in patients with right ventricular pacing

Objective To investigate the feasibility and safety between active fixation electrode and passive fixation electrode in patients with right ventricular outflow tract(RVOT) spetal and right ventricular apical pacing.Methods Sixty cases implanted with pacemaker were randomized into two groups.One group underwent the RVOT ventricular septal pacing with the active fixation electrodes(active electrode group,n=30).The other underwent the right ventricular apical pacing with passive fixation electrodes(passive electrode group,n=50).The parameters of the tow groups in and after operation were recorded.Results Operations in two groups were performed successfully and there were no complications.The pacing threshold in active electrode group was higher than that in passive electrode group immediately after operation(P<0.05).Pacing QRS duration in active electrode group was narrower than that in passive electrode group(P<0.05).There were no differences in pacing parameters between two groups at 1-6 months follow-up.Conclusion RVOT septal pacing with active fixation electrode is feasible and safe.