NPPB and atrial fibrillation: Calculation: Age < 65.53 years, LVEDD < 6.75 cm, QRS > 149 ms, BNP < 255 pg/mL, creatinine < 1.05 mg/dL, female sex, non-ischemic cardiomyopathy, no presence of atrial fibrillation. One point was attributed to each predictor.