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  • Title: T-wave oversensing in implantable cardiac defibrillators is due to technical failure of device sensing.
    Author: Gilliam FR.
    Journal: J Cardiovasc Electrophysiol; 2006 May; 17(5):553-6. PubMed ID: 16684033.
    Abstract:
    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.
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