Abstract 11058: Rescue Catheter Ablation for Electrical Storm due to Ventricular Tachycardia Can Reduce Ventricular Tachycardia and Electrical Storm Recurrence in Patients With Non-ischemic Cardiomyopathy
Aims: Previous studies reported that catheter ablation (CA) for Electrical storm (ES) could decrease ES recurrence. However, majority of the population was ischemic heart disease and the efficacy of CA for ES in non-ischemic cardiomyopathy (NICM) patients is still unknown. We assessed the efficacy of rescue CA in NICM patients.
Methods: 38 consecutive NICM patients with implantable cardioverter defibrillator (ICD) and subsequent ES due to ventricular tachycardia (VT) were retrospectively analyzed. We compared the clinical outcomes of patients received rescue CA (ABL group) and patients with medication alone (No ABL group). Successful CA was defined as non-inducibility of clinical VT. The endpoints were appropriate ICD therapy (VT recurrence), ES recurrence, all-cause death (ACD) and cardiovascular death (CVD).
Results: Mean follow-up was 889.7 ± 623.0 days. NICM were dilated cardiomyopathy, hypertrophic cardiomyopathy, cardiac sarcoidosis and others. Rescue CA was performed in 10 patients and succeeded in 7. Medication included beta-blocker and/or amiodarone/sotalol. In the ABL group, the time to VT recurrence was significantly longer (p=0.039) and number of treated VT per month during follow-up was lower than the No ABL group (0.77 ± 1.21 vs 2.78 ± 6.04, p=0.047). ES recurred in 3 patients in the ABL group and 16 in the No ABL group. 7 patients with successful CA (ABL success group) had no ES recurrence. (Figure1, 2) There was no ACD in the ABL group while 5 ACDs (including 3 CVDs) in the No ABL group. However, there was no significant statistical difference between them.
Conclusion: Rescue CA was able to reduce VT and ES recurrence even in NICM patients.
- © 2013 by American Heart Association, Inc.