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Sustained ventricular tachycardia (VT) is a leading caouse of death in patients with underlying heart disease. Upon anti-arrhythmic drug therapies and implantable cardiac devices (ICD), catheter ablation of VT is now considered an option for patients with drug refractory VT.
To determine the etiology, localization, ablation technique and success of VT ablation from our clinic.
113 patients treated with catheter ablation for VT were analysed retrospectively from patient records.
General features of patients were; mean age 48,6 (16-80), 55 male (48,9%) and 58 female (51,1%). Number of right ventricular outflow tract (RVOT) VT was 58 (51,3%), left venricular outflow VT was 22 (19,4%), fascicular VT was 13 (11,5%) and ischemic VT was 19 (16,8%). Localization of RVOT VTs were; septum origin was 39 (67%), free wall origin was 15 (25%) and tricuspid anulus origin was 4 (6,8%). Ablation technique was conventional in 65 patients (57,5%), ensite in 27 patients (23,8%) and carto in 21 (18,7%). Overall success rate was 85,8% (97 successful, 16 unseccessful). Success rate for RVOT VTs was 86,2% (50 successful, 8 unseccessful), LVOT VTs was 77,2% (17 successful, 5 unseccesful), ischemic VTs was 100% and for other VTs was 85% (17 successful, 3 unseccesful).
Catheter based ablation of VT in experienced centers, can be the only treatment option for drug refractory patients. With growing experience, success rate will reach the highest levels in the future.