Table 1

Baseline Characteristics of the Two Patient Groupslegend

RF Ablation (n = 31)Drug Therapy (n = 30)p Value
Age (yr)67 ± 866 ± 11NS
Male gender2022NS
Mean EF (%)49.4 ± 5.149.6 ± 3.1NS
Structural heart disease:
 Absent1617
 IHD1211
 IDC21
 VD1
 Other1
Paroxysmal atrial flutter (n)12NS
Persistent atrial flutter (n)3028NS
Median episodes per month of atrial flutter (range)1 (0–3)1 (0–2)NS
Mean No. of cardioversions before entering the study2.3 ± 0.52.2 ± 0.5NS
Mean No. of cardioversions after entering the study0.5 ± 1.24.4 ± 1.7< 0.01
Percentage of patients with atrial flutter recurrence after entering the study6% (2)93% (28)< 0.01
Percentage of patients with atrial fibrillation after entering the study29% (9)60% (18)< 0.05
Mean No. of arrhythmia episodes at follow-up0.7 ± 1.45.1 ± 2.0< 0.01
Percentage of patients requiring arrhythmia-related hospitalization at follow-up22% (7)63% (19)< 0.01
  • legend EF = ejection fraction; IDC = idiopathic dilated cardiomyopathy; IHD = ischemic heart disease; RF = radiofrequency; VD = valvular disease.