Figure 2.

Illustration of the anatomy and the ablation strategies. (A) The PVVJ was where the PVs adhere to the ventricle wall. The myocardial extensions were the ventricular musculatures that extended above the PVVJ. The yellow star indicated the EVA site. (B) Targeting the EVA site with the antegrade method. (C) The reversed U-curve was created in the bifurcation of PA by curving, advancing, and torquing the ablation catheter. Then, the reversed U-curve was loosened to contact the PA wall and retracted into PSC to engage the EVA site. EVA, earliest ventricular activating; PA, pulmonary artery; PSC, pulmonary sinus cusp; PV, pulmonary valve; PVVJ, pulmonary valve–ventricle junction; RVOT, right ventricular outflow tract; VA, ventricular arrhythmia.