Characteristics
Total (n=307)
Amiodarone failure (n=124)
Amiodarone Success (n=183)
p-value
Ablation type 0.02
RF ablation 251 (81.8) 109 (87.9) 142 (77.6)
Cryoballoon ablation 56 (18.2) 15 (12.1) 41 (22.4)
Index ablation 218 (71) 85 (68.5) 133 (72.7) 0.43
Cardioversion pre-ablation 228 (74.3) 105 (84.7) 123 (67.2) <0.01
Time of cardioversion pre-ablation (months) 3 (2–8) 3 (1.7-9.2) 3 (2-8) 0.77
Ablation strategy 0.03
PVI only 199 (64.8) 68 (54.8) 131 (71.6)
PVI and roof line 26 (8.5) 11 (8.9) 15 (8.2)
PVI and mitral line 3 (1) 2 (1.6) 1 (0.5)
PVI and focal ablation 10 (3.3) 6 (4.8) 4 (2.2)
PVI and combo/other 49 (16) 24 (19.4) 25 (13.7)
PVI with posterior box lesion 20 (6.5) 13 (10.5) 7 (3.8)
Rhythm at ablation <0.01
Sinus rhythm 183 (59.6) 0 (0) 183 (100)
Atrial fibrillation 97 (31.6) 97 (78.2) 0 (0)
Atrial flutter 27 (8.8) 27 (21.8) 0 (0)
Time to recurrence (months) 5 (3-7) 4 (3-7) 5 (3-7.5) 0.07
AAD after ablation in patients with recurrence 102 (33.2) 43 (34.7) 59 (32.2) 0.92
Cardioversion after ablation in patients with recurrence 80 (26.1) 43 (34.7) 37 (20.2) 0.02
Type of recurrence 0.80
Atrial fibrillation 93 (30.3) 34 (27.4) 59 (32.2)
Atrial flutter 28 (9.1) 12 (9.7) 16 (8.7)
Atrial tachycardia 1 (0.3) 0 (0) 1 (0.5)
Atrial fibrillation/ Atrial flutter 8 (2.6) 3 (2.4) 5 (2.7)
Repeat ablation 111 (36.2) 45 (36.3) 66 (36.1) 0.96