Ryan James D, Tempel Nathan D, Engle Dean D, Hayes David L, Cha Yong-Mei, Asirvatham Samuel J
Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, USA.
Pacing Clin Electrophysiol. 2018 Feb;41(2):161-166. doi: 10.1111/pace.13269. Epub 2018 Jan 24.
Transthoracic impedance measurements (TIM) is primarily used for minute ventilation rate adaptive sensors in pacemakers. With elevated impedance, the TIM electrical signal itself is oversensed, causing device malfunction.
We report an increased incidence of TIM oversensing.
Retrospective chart review. We review existing records of 18 patients who have demonstrated device malfunction with TIM oversensing.
We have found a 1.8% incidence of TIM-related oversensing in our patient population of 959 patients with contemporary Boston Scientific (Marlborough, MA, USA) pacemakers and cardiac resynchronization therapy pacemakers. One patient experienced a syncopal episode.
Oversensing with pacing inhibition is apparent with the potential of adverse effects to patients.
经胸阻抗测量（TIM）主要用于起搏器中的分钟通气率自适应传感器。随着阻抗升高，TIM电信号本身会被过度感知，导致设备故障。
我们报告了TIM过度感知的发生率增加。
回顾性病历审查。我们审查了18例因TIM过度感知而出现设备故障的患者的现有记录。
在我们959例使用当代美敦力公司（美国马萨诸塞州马尔伯勒）起搏器和心脏再同步治疗起搏器的患者中，发现TIM相关过度感知的发生率为1.8%。1例患者发生晕厥。
起搏抑制伴过度感知明显，对患者有潜在不良影响。
