Why the study?
Does the application of the electrogram width criterion prevent T-wave oversensing and inappropriate therapies in patients with ICDs?
Does the application of the electrogram width criterion prevent T-wave oversensing and inappropriate therapies in patients with ICDs?
The EGM width criterion may offer a novel programming strategy to prevent inappropriate ICD therapies due to T-wave oversensing without compromising true tachyarrhythmia detection.
May reduce inappropriate ICD shocks from T-wave oversensing; hypothesis-generating from Level 5 evidence and requires prospective validation.
Appropriate sensing is an essential function of an implantable cardioverter defibrillator (ICD). T-wave oversensing by an ICD can be a serious problem in some patients, causing overestimation of the heart rate, inappropriate tachyarrhythmia detection and therapy delivery. Decreasing the sensitivity or programming longer refractory periods can sometimes overcome T-wave oversensing, but these measures may interfere with the ability of the ICD to correctly detect tachyarrhythmias. This report proposes a novel application of the electrogram (EGM) width criterion using a recently introduced detection enhancement algorithm intended to improve the specificity of ventricular tachycardia detection, to avoid T-wave oversensing. Based on the course of a case with persistent T-wave oversensing and review of previously published reports, oversensing problems in ICDs and management strategies are discussed.
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Fırat Duru (2001) studied this question.
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