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