First-line medication in the AAD group was flecainide (200 mg per day) or propafenone
(600 mg per day). If they were contraindicated,amiodarone or sotalol was used. Supplementary use of a negative dromotropic agent (e.g., beta blocker) was recommended during class
IC antiarrhythmic medication. If the initial drug failed alternative medication or RFA (crossover)wasofferedasclinicallyindicated