Abstract 19384: Catheter Ablation of Scar-Based Ventricular Tachycardia: Impact of Procedural Duration on Outcomes
Background: The relationship of procedural duration with efficacy and complication rate in ventricular tachycardia (VT) ablation has not been well studied. The aim of this report is to examine the relationship between procedural duration and VT ablation outcomes.
Methods: All patients referred for VT ablation between 6/04-6/11 were included in the present study. Procedural duration was defined as the time from the insertion of catheter sheaths through the femoral vein to the time of their withdrawal. Variables that were recorded and analyzed for relationship to procedural duration included: number of induced VTs, in-hospital mortality, and 6-month outcomes.
Results: 148 patients with scar-mediated VT were available for analysis. The mean procedural duration for cases with endocardial, epicardial, and combined epicardial-endocardial VT mapping were: 5.1 ± 1.7, 5.0 ± 1.6, and 6.4 ± 1.7 hours, respectively. Longer procedural duration was associated with a greater number of VT morphologies induced (range 1.5- 3.7 mean VTs induced). The six month freedom from VT for the overall cohort was 53% (ICM=66% (49/74), NICM=39% (27/69)). The duration of the procedure did not impact success rates. An increase in in-hospital mortality was observed for procedures longer than eight hours.
Conclusion: While longer procedural duration was associated with comparable 6 month freedom from VT recurrence, an escalating risk for in-hospital mortality was seen in patients who underwent procedures longer than eight hours.
- © 2012 by American Heart Association, Inc.