Table 2

Clinical and Procedural Characteristics at Initial Radiofrequency Catheter Ablation (n = 130)

Clinical characteristics
 Age, yrs40.4 ± 12.8
 Male58 (45%)
 History of atrial fibrillation26 (20%)
 History of cardioversion78 (60%)
 Pacemaker26 (20%)
 Duration of first IART to RFCA, yrs2.5 (0.01–30.2)
AAD therapy107 (82%)
 Digoxin23 (18%)
 AAD class I6 (5%)
 AAD class II51 (39%)
 AAD class III60 (46%)
 AAD class IV10 (8%)
Echocardiogram
 Subaortic ventricular dysfunction, moderate or greater26 (20%)
 Subpulmonary ventricular dysfunction, moderate or greater18 (14%)
 Right atrial dilation, moderate or greater46 (35%)
Procedural characteristics
 Electroanatomic mapping84 (65%)
 Irrigated-tip ablation catheter89 (69%)
 Large-tip (8- or 10-mm) ablation catheter32 (25%)
 Procedure time, min225 (78–530)
 Fluoroscopy time, min42.4 (13.0–165.1)
 Ablation time, s1,161 (40–4,074)
Number of radiofrequency lesions24 (4–74)
>1 IART circuits32 (25%)
Acute procedural outcome
 Successful RFCA82 (63%)
 Unsuccessful RFCA48 (37%)

AAD = antiarrhythmic drug; IART = intra-atrial re-entrant tachycardia; RFCA = radiofrequency catheter ablation.