In laboratory data, brain natriuretic peptide (BNP) levels of patients were in the following order: early AF development, late AF development, and without AF (175.5 ± 131.3, 134.1 ± 116.5, 94.3 ± 166.9 pg/mL, respectively, p < 0.001). The gene discussed is NPPB; the disease is atrial fibrillation.