Procedural performance between two cryoballoon systems for ablation of atrial fibrillation depends on pulmonary vein anatomy.

Background: Cryoballoon ablation is a first-line therapy for atrial fibrillation. We compared the efficacy and safety of two ablation systems and addressed the influence of pulmonary vein (PV) anatomy on performance and outcome.

Methods: We consecutively enrolled 122 patients who were planned for first-time cryoballoon ablation.