Kappa700型双腔起搏器的临床随访

目的观察具有心室自动夺获功能（AC）的双腔起搏器（Kappa 700）置入后参数的变化情况和安全性。方法随访56例置人Kappa 700型起搏器患者，观察术后1周及术后1、3、6个月心室起搏阈值、输出电压等参数的变化。结果56例患者于术后1周打开心室自动夺获功能，心室起搏阈值在术后1周达到最大值，由植入时的（0．40±0．05）V升至（0．75±0．22）V，1—6个月后逐渐下降稳定于（0．61±0．31）V。心室起搏输出电压也随之升高而后逐渐下降稳定于（1．22±0．42）V，明显低于普通起搏器的输出电压（2．5～4．5V）。该起搏器由于具有电压4．5V，脉宽0．49ms的备用脉冲，保证了当心室失夺获时起搏的安全性。结论具有AC功能的Kappa 700型双腔起搏器输出能耗低、安全可靠。

Clinic obsersevation of dule chamber pacemaker autocapture function

Objective To observe the changing parameter and safty of dule chamber Pacemaker with ventricular autocapture function. Methods Ventricular stimulater threshold, ventricular output amplitude and so on were measured in fifty-six patients implanted Medtronic Kappar 700 pacemaker at 1 th week, 1 th month, 3th month,6 th month after implantation. Results The ventricular pacing threshold increased to the highest at 1 th week, from （0.40 ± 0.05） V to （0.75 ± 0.22） V, decreased to （1.22 ± 0.42） V after lth - 6th month, ventriculer output amplitude also increased, and dcreased slowly to （ 1.22 ± 0. 42） V, that is lower than the Dule chamber Pacemaker without autocapture function. Kappar 700 pacemaker is safty with backup （ amplitude4. 5V,pulse width0. 49 ms） pulse when the ventricular is not captured. Conclusion The result suggest that the dule chamber pacemaker with autocapture function could safly work with lower output amplitude.