e0557 CARTO mapping to guide ablation of right ventricular outflow tract tachycardia ventricualr contraction

Objective The aim of this study was to determine whether CARTO mapping is feasible in the right ventricle and assess its utility in guiding ablation of right ventricular outflow tract (RVOT) ventricualr tachycardia (VT). Background In patients with RVOT VT; CARTO mapping permits ablation guided by a VT complex, which may facilitate ablation of VT cases. However, the mapping system may be geometry- dependent, and it has not been validated in the unique geometry of the RVOT. Methods 30 patients with left bundle branch block and right axis VT, no history of structurally cardiac disease and normal left ventricular function underwent CARTO guided ablation. Results The procedure was acutely successful in 27 of 30 patients, 3 had failed ablation. During a mean follow-up of 6 months, 26 of 30 patients remained arrhythmia-free. Conclusions In this study, CARTO mapping was safely and effectively used to guide ablation of patients with RVOT VT.