【摘要】 目的:观察双腔心室自动阈值夺获起搏器的长期各参数变化,节能功能及起搏安全性。方法:对65例患者植入具有AC功能双腔起搏器,观察术中、术后6个月心室起搏阈值,输出电压,ER振幅,阻抗和极化电位及自动工作方式转换功能。结果:术后心室起搏阈值早期升高1.10V±0.18V以后逐渐稳定,长期心室起搏电压仅在0.45V±0.13V。63例在术后测定各参数即刻启动AC功能并于术后1周及6个月随访心室各参数变化。1例术中R波振幅15.2mV,ER值为10.4mV,极化电位0.4mV,术后发生心房颤动给普罗帕酮600mg转律,测试时发现AC功能自动关闭,当时ER值9.4mV,极化电位0.8mV,再测ER值10.2mV,极化电位0.4mV,AC功能可以打开并工作正常。比较术中、术后1周起搏阈值升高,P<0.05,术后一周与6个月相比起搏阈值下降,P<0.05。其余无统计学意义。结论:具有自动阈值夺获功能的双腔起搏器,高效能保护起搏电压,耗能低而且安全性好,能满足患者的生理需要。更多还原

【Abstract】 Objective:To observe changes on some parameter of the dual chamber pacemakers with ventricular auto-capture(AC) function,energy and safety.Methods:The dual chamber pacemakers with ventricular auto-capture function were implanted in 65 patients with heart disease from our hospital between Jan.2001 and Oct.2006.Stimulation threshold level,out-put amplitude,evoked response(ER),impedance and polarization potential were measured 1 week and six months after implantation.Results:Follow-up results of one week and the sixth month after implantation was as following: the mean ventricular pacing threshold rose 1.10V±0.18V in the early post-implantation,then it dropped and remained stable.And the long-term pacing-out-put amplitudes of those with AC function turned-on were 0.45V±13V.There was 1 case whose ER,polarization potential and R-wave were 10.4mV,0.4mV,15.2mV during operation and had a atrial fibrillation after operation but AC function recovered after giving propafenone 600mg orally,the ER and polarization potential were still in the normal range(ER was 9.4mV,polarization potential was 0.8mV);other than sinus rhythm returned on,AC function was activated(ER 10.2mV,polarization potential 0.4mV).The ventricular pacing threshold has a difference among during,1 week and six months after operation(P<0.05),as well as between.Conclusions:The dual chamber pacemaker with ventricular auto-capture function is better energy saving,and can satisfy with patient’s physiological need.It can reduce extra energy consumption too.更多还原