Table 2.

Procedure-related data for the patients with and without recurrence.

	Non-recurrent (N=37)	Recurrent (N=21)	p value
Step 1: PVI	7 (18.9)	3 (14.3)	0.329
Step 2: linear ablation of the left atrium	16 (43.2)	12 (57.1)	0.295
left isthmus line	12 (32.4)	8 (38.1)	0.549
left roof line	4 (10.8)	4 (19.0)	0.036
Steps 1 + 2	23 (62.2)	15 (71.4)	0.606
Step 3: additional linear ablation	14 (37.8)	6 (28.5)	0.329
All three steps	31 (83.8)	28 (76.2)	0.082
Electrical cardioversion	6 (16.2)	4 (23.8)	0.150

Values are given as the No. (%). Additional lines included the left atrium posterior wall line, the right atrium isthmus line and the SVC isolation line.