Ablation procedure
PVI was successfully completed in all patients, using Carto 3 in 479 (94%), Rhythmia in 20 (4%) and Ensite NavX in 11 (2%). The majority of cases underwent radiofrequency catheter ablation. Cryoballoon ablation was performed in 23 cases (5%).
Details of the initial and additional procedures are listed in Table 2. In the initial procedure, BOX isolation and LVA ablation were more frequently performed in group B and C. With the additional treatments, a higher percentage of PVI was completed in group C and there was more LVA ablation in groups B and C. In group A, SVC isolation was performed more frequently. There was no difference in the number of times ABL was performed among the three groups.