Abstract 16621: Clinical Results of Scar Related Ventricular Tachycardia Ablation Performed in a South America School Hospital

Introduction: Ventricular Tachycardia (VT) ablation is indicated in patients with recurrent episodes of VT or ICD shocks despite the use of AAD. Hypothesis: to evaluate the clinical characteristics and follow-up of patients that underwent scar related VT ablation in a school hospital in south america. Methods: We collected and analyzed data of all VT ablation performed in our institution between 2013 and 2014. Results: During the 2-year period we performed 107 scar related VT ablation procedures in 86 patients with an age of 56.7±14 years-old, most were male (70,9%). Sixty (56%) presented Chagas disease, 17 (16%) ischemic, 13 (12%) dilated, 12 (11%) RVAD and 5 (5%) other cardiomyopathies and the mean LV EF was 36.9±12.4%. The ablation was performed with CARTO in 60 (56,1%), Ensite 3 (2,8%) and EP only mapping in 44 (41,1%) procedures. Epicardial mapping was performed in 65 procedures (60,7%), most frequent in Chagas patients (81,7%;P<0.001). There was complications in 6 (5,6%) procedures: one hemopericardium that open-chest surgery was necessary; two iliac artery dissection, both with conservative treatment; one complete AV block; one patient with refractory hypotension with the need of IABP and procedure interruption and one patient with late cardiac tamponade with the need of surgical drainage. In a median follow-up of 261 (Q1: 93 Q3: 479) days, 42 (40%) procedures presented recurrence in a median time of 40 (Q1: 7.5 Q3: 125) days. After the VT recurrence the ablation was repeated, and one patient underwent 4 ablation, 2 three ablations and 13 underwent two ablations. Following the last ablation, 61 (72.6%) patients remained free of VT recurrence (figure). Sixteen (19%) patients died in a median time of 34 (Q1: 14.75 Q3: 93) days following last ablation. Conclusion: Chagas disease was the most common cardiopathy in this population, where epicardial approach was frequently performed. After the last procedure, the majority of patients remained free of VT recurrence