Conclusions
In the prospective single-center open-level randomized trial, half of the origins in idiopathic RVOT-type VAs were above the PV, and most were close to the PVVJ. The supravalvular and subvalvular strategies were not different in IA success rate, ablation application, complication, and VA recurrence. However, they complement locating the EVA sites and facilitate the ipsilateral ablation, which produces a significantly higher success rate.