Patients in AF group were older (40.61 ± 10.4 vs 34.71 ± 9.23 years; p < 0.0001), had a larger left atrium (53.76 + / - 8.03 vs 48.51 + / - 5.96 mm, p < 0.0001), a higher valvular calcification score (1.67 ± 0.77 vs 1.5 ± 0.78; p = 0.049) than those in the SR group.