Clinical impacts of changes of renal function during hospitalization depend on grades of renal dysfunction in acute decompensated heart failure

Clinical impact of changes of renal function (RF) in heart failure (HF) hospitalization is controversial. This study aimed to clarify whether clinical impact of changes of RF during HF hospitalization depends on the intrinsic RF. In 786 hospitalized HF patients, RF were classified into 3 grades based on estimated glomerular filtration rate (eGFR, mL/min/1.73 m2) at discharge; ≥ 60 (n = 243)