A stepwise multivariate regression analysis was performed including the following factors: age, gender, history of rehospitalization within the first 3 months after an episode of AHF, admission to the intensive care unit, history of MI, diabetes, AF, use of inotropic drugs during hospitalization, left ventricular end-diastolic dimension (LVEDD), LVEF, systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate and pulse pressure on admission, eGFR, NT-proBNP, blood sodium, and hemoglobin. Here, NPPB is linked to atrial fibrillation.