Department of Cardiology, Medical Center Alkmaar, Alkmaar, the Netherlands.
Neth Heart J. 2010 Jun;18(6):323-6. doi: 10.1007/BF03091784.
A 62-year-old patient presented with dizzy spells after her dual chamber pacemaker (Medtronic Enrhythm P1501DR), implanted for complete AV block, had been reprogrammed to deliver antitachycardia therapy (ATP) for paroxysmal atrial tachycardia. Her symptoms were caused by inhibition of ventricular backup pacing during ATP, leading to ventricular asystoles. Inhibition was the result of premature ventricular beats occurring prior to ATP: when ventricular backup pacing is left in the default setting, this pacemaker withholds backup pacing if any of the four preceding events is a sensed event. This case illustrates the possibly hazardous effects of default pacemaker settings, especially in pacemaker-dependent patients. (Neth Heart J 2010;18:323-6.).
一位 62 岁的患者在植入双腔起搏器（美敦力 Enrhythm P1501DR）以治疗完全性房室传导阻滞后，因阵发性房性心动过速而重新编程以提供抗心动过速治疗（ATP）后出现头晕。她的症状是由于 ATP 期间心室备用起搏被抑制导致心室停搏引起的。抑制是由于在 ATP 之前发生的室性早搏导致的：当心室备用起搏保留在默认设置时，如果四个前导事件中的任何一个是感知事件，则此起搏器将抑制备用起搏。该病例说明了默认起搏器设置的潜在危险影响，特别是在依赖起搏器的患者中。（Neth Heart J 2010;18:323-6.）。
