There were significant differences between the recurrence and no‐recurrence groups in terms of AF duration, AF type, CHA2DS2‐VASc score, history of DM, history of CHD, history of CHF, LAD, LVEDD, LVEF, glucose levels, albumin levels, BNP levels, neutrophil levels, lymphocyte levels, leukocyte levels, Naples Score, proportion of ablation to SR, ablation time, and the proportion of ER (p < 0.05). The gene discussed is ALB; the disease is diabetes mellitus.