Key result
PVCs during attempted VF reconfirmation can cause inappropriate ICD shocks.
Why the study?
Inappropriate shocks from implantable cardioverter-defibrillators occur in 15%-40% of patients, with rare causes needing description.
Case Report (n=2)
Knowledge of device algorithms for VF detection and reconfirmation allows for reprogramming to avoid inappropriate shocks caused by premature ventricular complexes.
PVCs during VF reconfirmation may trigger inappropriate ICD shocks; leaves open whether algorithm refinements reduce events.
Inappropriate shocks delivered by implantable cardioverter-defibrillators may occur in 15%-40% of patients treated with these devices. This article describes a rare cause for inappropriate shocks. Two patients received inappropriate shocks due to the presence of premature ventricular complexes during attempted reconfirmation of ventricular fibrillation. Knowledge of device algorithms for detection and reconfirmation of ventricular fibrillation, designed to have a high degree of sensitivity and therefore lower specificity, allows for reprogramming to avoid further inappropriate shocks.
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Goldberger et al. (1999) conducted a case report in Inappropriate implantable cardioverter-defibrillator shocks (n=2). Premature ventricular complexes during reconfirmation of ventricular fibrillation was evaluated on Inappropriate shocks. Premature ventricular complexes during attempted reconfirmation of ventricular fibrillation can cause inappropriate implantable cardioverter-defibrillator shocks.
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