Vijayaraman Pugazhendhi, Vaidya Kedarnath, Kim Soo G, Gross Jay N, Ferrick Kevin J, Palma Eugen, Furman Seymour, Fisher John D
Cardiovascular Division, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York 10467, USA.
Pacing Clin Electrophysiol. 2002 Feb;25(2):220-2. doi: 10.1046/j.1460-9592.2002.00220.x.
Runaway pacemaker is an uncommon, potentially lethal circuit malfunction characterized by sudden onset of erratic pacing at rapid nonphysiological rates. Two patients with a single chamber pacemaker (Medtronic ST 8331 and 8419) presented with episodic dizziness. ECG revealed recurrent decrescendo amplitude episodes of runaway stimuli at 2,400 and 2,600 ppm, approximately 3 seconds in duration, separated by pacing at 62.5 and 65 ppm, respectively. Fortunately the runaway stimuli were subthreshold and did not result in capture of the ventricle. Emergency pulse generator replacement was uneventful. Both leads were normal and both pulse generators had low battery voltages at 1.488 and 1.78 V, respectively.
失控起搏器是一种罕见的、具有潜在致命性的电路故障，其特征是突然以快速的非生理速率出现不规律起搏。两名单腔起搏器（美敦力ST 8331和8419）患者出现发作性头晕。心电图显示反复出现幅度递减的失控刺激发作，频率分别为2400和2600次/分钟，持续约3秒，中间分别以62.5和65次/分钟的频率起搏。幸运的是，失控刺激为阈下刺激，未导致心室夺获。紧急更换脉冲发生器过程顺利。两根导线均正常，两个脉冲发生器的电池电压分别较低，为1.488伏和1.78伏。
