PO-04-229 ELECTROCARDIOGRAPHY CHARACTERISTICS OF VENTRICULAR ARRHYTHMIAS ARISING FROM SUPRA-PULMONARY CUSPS AND HIGH RIGHT VENTRICULAR OUTFLOW TRACT

Ventricular arrhythmia (VA) has been successfully ablated from the supra-pulmonary sinus cusps (PSC). However, electrocardiography (ECG) characteristics for VA originating above PSCs and high right ventricular outflow tract (RVOT) are not well-elucidated. We aimed to investigate ECG of supra-PSC RVOT. Patients with RVOT-type VAs who also underwent RVOT angiography were included. Three-dimensional electroanatomic mapping was performed in all patients. The successful sites ablation, which (supra-PSC group) or within 1 cm below (high confirmed by angiography. mapped looping catheter a reverse U fashion. Thirty-six 37 patients identified groups respectively. In group, there significantly shorter intervals measured earliest activation peak R wave lead II, III, aVF on surface during (Table). cut-off 66ms, 69ms respectively, AUC values 0.944, 0.913 have ECG, that well differentiated between These findings help make pre-procedure planning map ablate region according ECG.