NPPB and atrial fibrillation: Univariate results are shown in Table 1: univariate analysis results show that the NT Pro‐BNP, age, systolic blood pressure, diastolic blood pressure, total cholesterol, triglycerides, urea nitrogen, creatinine, creatine kinase, glycosylated hemoglobin, fibrin degradation products, QRS interphase, left atrial diameter, left ventricular diameter, ejection fraction, cardiac output, cerebral infarction, hypertension, and coronary heart disease may be associated with AF (p < .05).