Objective: This study was designed to compare clinical efficacy of segmental pulmonary vein ablation (SPVI), amiodarone or amiodarone plus losartan on sinus rhythm maintenance in patients with lone paroxysmal atrial fibrillation (PAF).
Methods: Patients with lone PAF were treated with amiodarone alone (A, n = 52), segmental pulmonary vein isolation (SPVI, n = 51), or amiodarone plus losartan (AL, n = 51). The primary endpoint of this study was the incidence of symptomatic atrial tachyarrhythmia (> 30 s) documented by 12 lead ECG or Holter during 12 months follow-up period.
Results: During follow-up, AF was documented in 24 patients (46.2%) in A group, 11 patients (21.6%) in SPVI group and 12 (23.5%) in AL group (P < 0.05 vs. A group). The Kaplan-Meier survival analysis demonstrated a significant equally reduction in AF recurrence in SPVI and AL groups (P = 0.009, log-rank test and P = 0.018, log-rank test, respectively) compared with A group. The hazard ratio for AF recurrence in patients treated with SPVI and amiodarone plus losartan was 0.41 (95% CI 0.200 to 0.848, P = 0.016) and 0.46 (95% CI 0.225 to 0.953, P = 0.036), respectively. Incidences of major adverse cardiac events were similar among the groups (9.6% in A, 3.9% in SPVI and 7.8% in AL group, P > 0.05).
Conclusion: The results of this study suggest that the segmental pulmonary vein isolation and amiodarone plus losartan are superior to amiodarone alone for preventing AF recurrence in patients with lone PAF.
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