主动固定电极行右心室流出道间隔部起搏的临床应用研究

目的 探讨采用主动固定电极行右心室流出道(RvOT)间隔部起搏的可行性.方法 52例需植入心脏起搏器患者,22例采用主动固定电极行RVOT间隔部起搏(主动电极组),30例应用被动固定电极行右心室心尖部起搏(被动电极组).记录术中及随访期间两组各项起搏参数.结果 RVOT间隔部起搏定位成功率100%,主动电极组的植入时间和曝光时间均长于被动电极组(56.13±1.18)min比(15.42±1.24)min,(18.77±6.14)min比(10.12±8.14)min,P<0.05].主动电极组的QRS波时限短于被动电极组(0.14±0.02)ms比(0.16±0.04)ms,P<0.05].术后随访期间两组起搏参数稳定,未见电极脱位等并发症发生.结论 主动固定电极行RVOT间隔部起搏是安全可行的.

The study on the application of active fixation electrodes in patients with right ventricular outflow tract septal pacing

Objective To explore the feasibility of right ventricular outflow tract (RVOT) septal pacing. Methods Fifty-two patients implanted with pacemaker were randomly divided into two groups. One group underwent the RVOT septal pacing with active fixation electrodes (active fixation electrodes group, 22 cases),and the other group underwent the right ventricular apical pacing with passive fixation electrodes (passive fixation electrodes group, 30 cases). The parameters of two groups in operation were recorded. Results The successful rate of RVOT septal pacing was 100%, active fixation electrodes group took more time to plant electrodes and expose in X-ray than passive fixation electrodes group (56.13±1.18)min vs (15.42±1.24) min, (18.77±6.14) min vs (10.12±8.14) min, P<0.05]. The width of the QRS wave of active fixation electrodes group was narrower than that of passive fixation electrodes group (0.14±0.02)ms vs (0.16±0.04) ms, P< 0.05]. The parameters of two groups were stable in follow-up period and none of electrodes was extracted. Conclusion The usage of active fixation electrodes in patients with RVOT septal pacing is feasible and safe.