There were no significant differences between the two groups in terms of body mass index, New York Heart Association functional class, LVEF, past history, etiology of HF, systolic blood pressure, plasma brain natriuretic peptide (BNP), estimated glomerular filtration rate, blood glucose levels, oral medication before admission, and worsening renal failure during hospitalization. The gene discussed is NPPB; the disease is hydrops fetalis.