Among the patients with AF, there was no statistically significant difference in the level of BNP (135.0 ± 123.7 vs. 121.4 ± 103.1, P = 0.449) or D-dimer (215.8 ± 794.1 vs. 111.0 ± 152.4, P = 0.145) between patients with AF recurrence and those without (Table 3). The gene discussed is NPPB; the disease is atrial fibrillation.