Correspondence n engl j med 375;11 nejm.org September 15, 2016 excluded for right-sided pulmonary-vein diameters greater than 26 mm. In the trial, 98.9% of all pulmonary veins were isolated at the index procedure in the cryoballoon group, as compared with 97.9% in the radiofrequency group. In the cryoballoon group, 100% of the left common pulmonary veins (28 of 28) and 92% of the right middle pulmonary veins (12 of 13) were isolated at the index procedure. In the radiofrequency group, 77% of the left common pulmonary veins (30 of 39) and 48% of the right middle pulmonary veins (11 of 23) were isolated at the index ablation.Currently, prescreening of pulmonary-vein anatomical features is not required. More important, the cryoballoon group has shown significantly fewer reinterventions and rehospitalizations than the radiofrequency group, 3 and these patient-relevant disease-burden characteristics should be considered when making the decision about what type of catheter ablation should be performed.
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