Avoiding inappropriate ventricular tachycardia detection due to T-wave oversensing in an implantable cardioverter defibrillator: a novel application of the electrogram width criterion
F. Duru et al., Avoiding inappropriate ventricular tachycardia detection due to T-wave oversensing in an implantable cardioverter defibrillator: a novel application of the electrogram width criterion, EUROPACE, 3(1), 2001, pp. 80-84
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 over
sensing, but these measures may interfere with the ability of the ICD to co
rrectly detect tachyarrhythmias. This report proposes a novel application o
f the electrogram (EGM) width criterion using a recently introduced detecti
on 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 publish
ed reports, oversensing problems in ICDs and management strategies are disc
ussed. (Europace 2001; 3: 80-84) (C) 2001 The European Society of Cardiolog
y.