Catheter Ablation -> Ventricular Arrhythmias -> Clinical Trials / Outcomes D-PO05 - Poster Session V (ID 39) Poster

D-PO05-203 - Early Recurrence Of Ventricular Tachycardia Following Ablation And Mortality (ID 593)


Background: There are limited data to suggest that earlier recurrence of ventricular tachycardia (VT) following VT ablation is associated with higher mortality
Objective: Assess timing to recurrence after VT ablation and its association with mortality
Methods: All patients undergoing VT ablation at our center were enrolled in a prospectively maintained registry. All 113 patients with VT recurrence following a fist ablation were included. (2011 - 2017). Recurrent VT was defined as documented sustained VT, or VT requiring device intervention (ATP or shock).
Results: Median age was 63 years [IQR 55 years - 74 years], 18 (15.9%) were females, and 72 (63.7%) had ischemic cardiomyopathy, with median LVEF of 40% [IQR 30% - 50%]. The overall mortality rate was 32.7% over a median follow up period of 32 months [IQR 13.5 - 51.5]. A median of 2 [IQR 1 - 2.75] VTs were induced in each patient, with a median of 1 clinical VT [IQR 1 - 1] per patient, and a median cycle length of 395 ms. Patients were divided into 3 groups; group 1 (n=45) with very early recurrence after ablation (0 to <30 days), group 2 (n=27) with early recurrence after ablation (30 days to <180 days), and group 3 (n=41) with late recurrence after ablation (≥180 days). Baseline clinical characteristics including age, gender, ischemic/non-ischemic substrate, and LVEF, were not significantly different between the 3 groups. (Table 1) Mortality rates did not differ significantly between the groups, and were 33.3% in group 1, 37% in group 2, and 29.3% in group 3 (p=0.7).
Conclusion: Earlier recurrence of ventricular tachycardia following the first VT ablation was not associated with a higher rate of mortality.