To uncover the link between atrial fibrillation and the results of the two genotyping methods, we examined the correlation between the two genotyping results and SCN5A, KCNH2, TBX3, TBX5, NKX2-5, PITX2, PRRX1, KCNJ5, CASQ2, PKP2, GJA5, KCNJ2, and MYH7. The gene discussed is KCNJ2; the disease is atrial fibrillation.