The mechanism proposed to the treatment of drug-resistant DCM with dual-chamber pacing may be as follows:(1) A short AV interval is just an optimal timing of atrial systole to occur just before isovolumic contraction and lengthening of the duration of mitral inflow, thus increase the left ventricular filling.
DDD起搏治疗药物难治性DCM的机理可能是：(1)较短的AV间期可能为心房收缩正好发生在心室等容收缩前，延长了流经二尖瓣的血流时间，增加了左心室的充盈量。
Objective: A prospective study was undertaken to evaluate both atrial and ventricular bipolar tined steroid eluting leads in long term dual chamber pacing.
目的：观察激素释放电极对心房和心室起搏阈值长期的影响，检验激素释放电极能否用来长期低能量安全的进行双心腔起搏。
Methods Eighteen patients affected by sick sinus syndrome and complete atrial ventricular block were implanted dual chamber pacemakers with sleep function.
方法18例因病窦综合征及完全性房室传导阻滞置入带有睡眠功能的双腔起搏器。
From the apical four chamber view, diastolic mitral flow was recorded using pulsed Doppler and peak filling velocity in early diastole (E), peak filling velocity in atrial contraction (A), E/A ratio and early diastolic filling deceleration time (DT) were measured.
在心尖四腔心切面，脉冲波多普勒记录舒张期二尖瓣口血流，测量舒张早期峰值血流充盈速度（E）、心房收缩期峰值血流充盈速度（A）、E/A比值及舒张早期血流充盈减速时间（DT）。
Objective To assess the impact of mode switching algorithms of dual-chamber pacemakers on atrial tachyarrhythmia.
目的：观察双腔起搏器自动模式转换功能在房性心律失常治疗中的应用效果。
Evaluation of automatic mode switch of dual chamber pacing in paroxysmal atrial tachyarrhythmia
双腔起搏器自动工作方式转换功能在阵发性房性快速心律失常中的评价
Conclusion Dual-chamber ICD could improve recognizing of atrial tachycardias and reduce false shocks.
结论双腔ICD由于增加了心房电极导线，可提高对房性心律失常的识别能力，从而减少误放电。对伴有房性心律失常及心动过缓者应推荐使用双腔ICD。