TNNT2 and atrial fibrillation: In our cohort, the variants with the highest MAFs were located in KCNQ1 (rs120074186, MAF = 0.000351) and TNNT2 (chr1:g.201359627T>G, MAF = 0.000351), reflecting the findings from other studies that emphasize the genetic diversity and clinical significance of AF-related variants [8].