Marlborough, Mass.-based Boston Scientific Corp. is heralding results from a study of its Luminize radiofrequency (RF) balloon catheter for isolation of pulmonary veins (PV) when treating patients with atrial fibrillation. The prospective, nonrandomized, multicenter study, known as AF-FICIENT I, enrolled 100 patients with symptoms of paroxysmal – or intermittent – atrial fibrillation.