Gilliam F Roosevelt
Duke University Medical Center, Durham, North Carolina 27710, USA.
J Cardiovasc Electrophysiol. 2006 May;17(5):553-6. doi: 10.1111/j.1540-8167.2005.00350.x.
The expanded indications for the use of implantable cardioverter defibrillators (ICDs) for primary prevention of sudden cardiac death have increased concerns about inappropriate delivery of therapies. Dual-chamber systems have improved the capacity of ICDs to differentiate ventricular arrhythmias from supraventricular arrhythmias. Still, T-wave oversensing is a major source of inappropriate therapy. It is likely the true incidence of T-wave oversensing is greater than reported as documented events reflect only those stored in a device memory. Reviewing cases of T-wave oversensing that failed noninvasive correction; we found successful resolution resulted from generator replacement. We conclude that T-wave oversensing is due to inadequate signal processing by some ICD generators.
植入式心脏复律除颤器（ICD）用于心脏性猝死一级预防的适应证扩大，引发了人们对不适当治疗的更多关注。双腔系统提高了ICD区分室性心律失常和室上性心律失常的能力。尽管如此，T波感知过度仍是不适当治疗的主要原因。T波感知过度的实际发生率可能高于报告的发生率，因为记录的事件仅反映了存储在设备存储器中的那些情况。回顾那些非侵入性纠正失败的T波感知过度病例，我们发现更换发生器可成功解决问题。我们得出结论，T波感知过度是由于一些ICD发生器的信号处理不足所致。
