心脏起搏器自动阈值夺获功能对使用寿命的影响

［摘要］ 目的　比较具有自动阈值夺获功能和不具有自动阈值夺获功能的心脏起搏器（VVI型）使用寿命，以总结具有自动阈值夺获功能的心脏起搏器对延长使用寿命的价值．方法　将74例患者按照心脏起搏器是否具有自动阈值夺获功能，分为普通组和观察组．普通组心脏起搏器不具有自动阈值夺获功能，共48例，观察组使用具有自动阈值夺获功能的心脏起搏器，共26例，观察组患者的VVI型起搏器具备自动阈值夺获功能，能够在预设的时间内自动测量阈值并自动相应调整输出电压，保证以大于阈值0.3V的电压输出实现人工心脏起搏．比较2组的有关参数、使用寿命．结果 （1）普通组平均工作电压为（2.8±0.4）V，观察组平均工作电压为（1.1±0.4）V，差异有统计学意义；（2）观察组寿命为（12.59±0.55）a，普通组为（6.74±1.12）a，其使用寿命较普通组延长了86.8%，差异有统计学意义（P＜0.05）．结论　心脏起搏器具有自动阈值夺获功能可以更好的保障起搏器的安全，在同等使用条件下，还可以延长心脏起搏器的使用寿命，值得在临床中推广使用.

The Impact of Autocapture Function on the Service life of Cardiac Pacemaker

［Abstract］Objective　This study aimed to estimate the impact of the threshold of Autocapture algorithm on the pacemaker's service life．Methods　Seventy-four patients implanted with VVI pacemaker were retrospectively evaluated. Among them，48 were implanted with pacemaker of autocapture function. Diagnostic data were retrieved from device memory. Pacemaker's service life was estimated according to the working flow and voltage．Results（1） The average working voltage of the control group and the observation group was（2.8±0.4）V and（1.1±0.4）V respectively. The difference was statistically significant；（2）The battery life in the observation group was （12.59±0.55）a，significantly longer than that in the control group（6.74±1.12）a，with an 86.8% increase of the device's estimated service life（P＜0.05）. Conclusion　The Autocapture function results in a significant service life of cardiac pacemaker and represents valuable clinical technology.