Follow-up after index procedure
All patients were followed by 2 electrophysiologists (AZ, BC) at the center where the index ablation was performed. Follow-up consisted of an in-patient visit every 3 months, which included at least 12-lead ECG. A 7-day Holter ECG monitoring was systematically performed at 3 months and 1 year after the index procedure. No patient was lost to follow-up.