Therefore, the objectives of our study were as follows: (1) to measure the prevalence of HF stages in an elderly inpatient-based cohort; (2) to measure the predictive value of HF stages; and (3) to determine the level of N-terminal pro-brain natriuretic peptide (NT-proBNP) that would predict outcome in various HF stages. The gene discussed is NPPB; the disease is hydrops fetalis.