Catheter ablation of atrial fibrillation: Radiofrequency catheter ablation for redo procedures after cryoablation

Table 1 Clinical data

Clinical data	Group A	Group B	Total	P value
Patients (men/women)	20 (13/7)	10 (8/2)	30 (21/9)	0.67
Age (yr, mean ± SD)	60.0 ± 10.7	58.9 ± 9.2	59.6 ± 10.0	0.81
Cardiac disease				0.84
None	8	6	14
CAD	3	1	4
DCM	2	1	3
Valvular heart disease1	5	1	6
Other	2	1	3
Left ventricular ejection fraction mean (SD)	54.7% (12.0%)	53.8% (10.3%)	54.4% (11.2%)	0.86
Previous cardiac surgery	1	1	2	1.00
Current antiarrhythmic drug therapy prior to the initial ablation procedure				0.94
Class Ic (e.g., Flecainide, Propafenone)	3	2	5
Class III (e.g., Amiodarone, Sotalol)	6	1	7
Beta-Blocker in combination with a class Ic or class III antiarrhythmic drug	4/2	3/1	7/3
Beta-Blocker	2	1	3
Digitalis	1	1	2
Other	2	1	3
Current antiarrhythmic drug therapy prior to the repeat ablation procedure				0.57
Class Ic (e.g., Flecainide, Propafenone)	2	1	3
Class III (e.g., Amiodarone, Sotalol)	4	1	5
Beta-Blocker in combination with a class Ic or class III antiarrhythmic drug	4/2	2/1	6/3
Beta-Blocker	4	1	5
Digitalis	2	0	2
Other	2	4	6

¹Not requiring surgery. CAD: Coronary artery disease; DCM: Dilated cardiomyopathy (left ventricular ejection fraction < 40 %).