Ablations were performed under therapeuticwarfarin treatment. Intravenous heparin
was administered according to institutional standards after transseptal puncture(s). Pulmonary vein isolation and additional ablation lines were performed using an electroanatomical
mapping system (CARTO, Biosense Webster) as described previously[8,9]. AAD therapy was
allowed during the three months“blanking period”. Thereafter patients with recurrent AF
were offered reablation or supplementary AAD therapy (crossover