Data are n (%) or median [interquartile range (IQR)] or mean ± SD.
a: for the 20 patients with successful MI block at index procedure
Abbreviations. AF: atrial fibrillation; AT: atrial tachycardia; CTI: cavotricuspid isthmus; EIVM: ethanol infusion in the vein of Marshall; PV: pulmonary vein; VOM: vein of Marshall