Coumel P, Mugica J, Barold S S
Am J Cardiol. 1975 Jul;36(1):105-9. doi: 10.1016/0002-9149(75)90875-9.
This report describes how the testing magnet was used to diagnose intermittent and incomplete electrode fracture in two patients with an implanted demand pacemaker. During fixed-rate pacing the interval between two consecutive pacemaker spikes intermittently doubled in length, suggesting that the pulse generator was continuing to fire on time into a transiently disrupted circuit. Attenuated pacemaker spikes occurring at the anticipated time of pacemaker discharge also provided a diagnostic clue. Ventricular electrograms from the defective electrodes registered small false signals.
本报告描述了如何使用测试磁铁诊断两名植入按需起搏器患者的间歇性和不完全电极断裂情况。在固定频率起搏期间，两个连续起搏器脉冲之间的间期长度间歇性加倍，提示脉冲发生器按时向短暂中断的电路放电。在预期起搏器放电时间出现的衰减起搏器脉冲也提供了诊断线索。来自故障电极的心室电图记录到小的假信号。
