Comparison of PolarX and the Arctic Front Cryoballoons for PVI in Patients With Symptomatic Paroxysmal AF

Pulmonary vein isolation (PVI) is an effective treatment for atrial fibrillation (AF). Single shot devices are increasingly used for PVI. Currently, Medtronic Arctic Front cryoballoon is the most frequently used single shot technology and hence is the benchmark for upcoming technologies. A novel cryoballoon technology has recently been introduced (PolarX, Boston Scientific). However, whether PolarX provides effectiveness similar to the standard-of-practice Medtronic Arctic Front cryoballoon is yet to be investigated. Given that PolarX was developed considering the reported limitations and potential failures associated with the Medtronic Arctic Front cryoballoon, it might be even more effective and safe for use in AF ablation procedures. The aim of this trial is to compare the efficacy and safety of the PolarX Cryoballoon (Boston Scientific) and the Arctic Front Cryoballoon (Medtronic) in patients with symptomatic paroxysmal AF undergoing their first PVI. This is an investigator-initiated, multicenter, randomized controlled, open-label trial with blinded endpoint adjudication. Given that the Medtronic Arctic Front Cryoballoon is the standard-of-practice for single shot PVI and the PolarX is the novel technology, this trial has a non-inferiority design. The hypothesis with regards to the primary efficacy endpoint is that the PolarX Cryoballoon (Boston Scientific) shows lower efficacy compared to the Arctic Front Cryoballoon (Medtronic) and that therefore more episodes of fir…

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