NPPB and hydrops fetalis: Other prognostic risk models have also been established in AHF, such as the Organized Program to Initiate Lifesaving Treatment in Hospitalized Patients with Heart Failure (OPTIMIZE-HF) scoring system [26], the Acute Decompensated Heart failure/N-Terminal proB-type Natriuretic Peptide (ADHF/NT-proBNP) risk score [27,28], the Acute Physiology and Chronic Health Evaluation-Heart Failure (APACHE-HF) scoring system [29] and the Evaluation Study of Congestive Heart Failure and Pulmonary Artery Catheterization Effectiveness (ESCAPE) discharge model [30].