Boston Scientific's Cryoballoon in the Treatment of Symptomatic Drug Refractory Paroxysmal Atrial Fibrillation

To establish the safety and effectiveness of the Boston Scientific Cardiac Cryoablation System for treatment of symptomatic, drug refractory, recurrent, paroxysmal atrial fibrillation (AF).

Multi-center, open label, prospective, single arm study to document the safety and performance of Boston Scientific's Cryoablation System. The Cryoablation System is intended for cryoablation and electrical mapping of the pulmonary veins for pulmonary vein isolation (PVI) in the ablation treatment of patients with paroxysmal atrial fibrillation (PAF). All subjects fitting the enrollment criteria, signing the consent and undergoing the index procedure with the study devices will be followed up for twelve (12) months after the index procedure.