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Aims Pulmonary vein ablation offers the potential to cure patients with atrial fibrillation. In this study, we investigated the incidence of pulmonary vein stenosis after radiofrequency catheter ablation of refractory atrial fibrillation by systematic long-term follow-up.Methods and results Forty-seven patients with refractory and highly symptomatic atrial fibrillation underwent radiofrequency catheter...