Discordances
The overall IA success rate was lower than previous studies.8,10 Firstly, the 30w and 10s ablation attempts had avoided collateral damage to VA origins from ablation at a distal target. The setting resulted in a low IA success rate in patients with contralateral ablation. Secondly, the proportion of patients with supravalvular EVA site was fewer than Zhang’s cohort [(20/33(60.6%) vs. 72/81(88.9%)].8 Lastly, since the antegrade method is inferior in catheter stability to the reversed U-curve method, the subvalvular strategy was more susceptible to IA failure as more ablation applications were consumed.9