GJA1 and atrial fibrillation: The total HR during AF was higher in the persistent AF patients with the GJA1 SNP rs1015451 minor allele than in those without it in the screening set (TT 110,643 ± 17,542 beats/day, TC 116,350 ± 19,060 beats/day, CC 122,163 ± 25,684 beats/day, P = 8.5 × 10−4; TT vs CC: P = 2.5 × 10−3, TT vs TC: P = 1.5 × 10−2, TC vs CC: P = 0.12, Fig. 1).