双腔起搏器最小化心室起搏功能中心室起搏管理与房室间期自动搜索功能的比较分析

目的:比较最小化心室起搏中心室起搏管理(MVP)与房室间期自动搜索Search AV(+)]功能对右室起搏比例(VP％)及左室射血分数(LVEF)的影响.方法:50例症状性窦缓、病态窦房结综合征、间歇性房室传导阻滞的患者,均安装双腔起搏器,分为MVP组和Search AV(+)组,程控MVP组关闭Search AV(+)功能,开启MVP功能;Search AV(+)组开启Search AV(+)功能.于术后随访,比较其6个月的心房起搏、心室起搏比例、高频心房事件次数,及LVEF的值.结果:50例患者完成随访,MVP组比Search AV(+)组的心室起搏比例、高频心房事件次数都显著降低,分别为(11.4±8.3)％,(36.7±7.4)％和(32±10)次,(86±16)次;6个月的LVEF值较术前有显著差异,两组心房起搏比例、12个月的LVEF值差异无统计学意义.结论:MVP功能与SearchAV(+)功能相比可更加减少不必要的右心室起搏,减少高频心房事件.

Comparison of Managed Ventricular Pacing and Search AV(+) Algorithm in Dual Chamber Pacemaker of Minimizing Ventricular Pacing

Objective: To examine the difference of two strategies as managed ventricular pacing(MVP) and Search AV(+) algorithm on the percentage of right ventricular pacing and LVEF level in dual chamber pacemaker.Methods: A total of 50 symptomatic bradycardia,sick sinus syndrome or paroxysmal atrioventricular block patients were implanted with a pacemaker equipped with both algorithms(MVP or Search AV(+)) were enrolled.They were divided into two groups: MVP group and Search AV(+) group and followed up for 3,6,and 12 months respectively after implantation.The percent of atrial pacing,ventricular pacing,and atrial high frequencies events were compared respectively,and LVEF were examined on 6 months’ follow-up.Results: Fifty patients completed the follow-up study.The percent of ventricular pacing and atrial high frequencies events were lower in MVP group than in Search AV(+) group as(11.4±8.3)% vs(36.7±7.4) % and(32±10) times vs(86±16) times,respectively.There was no difference in atrial pacing percent and LVEF after 12 months between Search AV(+) and MVP groups.Conclusion: Managed ventricular pacing algorithm,when compared with Search AV(+),offers further ventricular pacing reduction in patients implanted with a dual-chamber pacemaker,and reduces atrial high frequencies events.