Efficacy of catheter ablation at the atrium-to-pulmonary vein junction in the treatment of atrial tachyarrhythmias occurring after anatomical circumferential ablation of atrial fibrillation

      Background: Recurrence of atrial fibrillation (AF) or new occurrence left atrial flutter (LAFL) after anatomical circumferential ablation (ACA) of pulmonary veins (PVs) represent a clinical challenge because of the different mechanisms that may underly these clinical arrhythmias.
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