Endocardial catheter ablation of ventricular tachycardia in patients with ventricular assist devices

BackgroundThe outcomes of patients with ventricular assist devices (VADs) who undergo catheter ablation for ventricular tachycardia (VT) have not been reported.ObjectiveThe purpose of this study was to assess the feasibility, safety, and efficacy of endocardial VT ablation in patients with VADs.MethodsWe retrospectively reviewed three cases at our institution where endocardial catheter ablation was performed in patients with VADs and incessant VT.ResultsThree patients with underlying cardiomyopathies and VADs underwent VT ablation for incessant VT refractory to multiple antiarrhythmic medications. In each case, VT was either eliminated or significantly ameliorated by catheter ablation. No procedure-related complications occurred. The hemodynamic stability afforded by the VAD played an important role in facilitating ablation in two of the cases.ConclusionCatheter ablation for VT in VAD patients appears to be feasible, safe, and effective based on our initial experience. Several technical issues, such as decreases in ventricular volumes that can limit maneuverability of the ablation catheter and potential entrapment of the mapping catheter in the inflow cannula, need to be considered at the time of ablation.