DDD起搏器心房起搏比例对植入后心房高频事件的影响

Effect of atrial pacing proportion on atrial high-rate episodes after implantation of DDD pacemaker

目的:研究心房起搏比例对DDD起搏器植入后心房高频事件的影响。方法 :DDD起搏器植入后打开房性心律失常高频事件记录功能,心房高频事件触发记录的标准为心房频率≥180次/min并且持续20个心动周期。将心房起搏比例大于40%设为高心房起搏比例组,心房起搏比例小于40%设为低心房起搏比例组。比较两组间心房高频事件的每月发作频率、首次心房颤动的发作时间,并绘制关于心房高频事件的Kaplan-Meier曲线。结果:与低心房起搏比例组相比,高心房起搏比例组心房高频事件的每月发作频率显著更低,首次心房颤动的发作时间显著更晚。Kaplan-Meier曲线显示随着随访时间的延长,高心房起搏比例组心房高频事件的累计发生率更低。结论:较高的心房起搏比例对于DDD起搏器植入术后快速房性心律失常的发生具有抑制作用。

Objective To investigate the effect of atrial pacing proportion on atrial high-rate episodes after implantation of DDD pacemaker. Methods After implantation of DDD pacemaker, the recording function of atrial high-rate episodes was switched on. If the atrial rate is over 180 per minute for 20 continuous cardiac cycles or more, it will be recorded as an atrial high-rate episode. We defined the high pacing proportion（HPP） group as the atrial pacing proportion over 40% and defined the low pacing proportion （LPP） group as the atrial pacing proportion below 40%. The monthly frequency of the atrial high-rate episodes and the occurring time of the first atrial fibrillation were compared between the HPP and LPP groups. The Kaplan-Meier curves about atrial high-rate episodes were also drawn. Results Compared with the LPP group, the frequency of the atrial high-rate episodes was significantly reduced, and the occurring time of the first atrial fibrillation was significantly delayed in the HPP group. As shown from the Kaplan-Meier curves, the cumulative incidence of the atrial high-rate episodes in the HPP group was more lower. Conclusion High atrial pacing proportion can inhibit the atrial high-rate episodes after implantation of DDD pacemaker.