Renal function, serum sodium level, and outcomes in hospitalized systolic heart failure patients: An analysis of the COAST study

摘要

Both renal function and serum sodium level are well-known prognostic markers in heart failure (HF) patients. We investigated the prognostic value of the renal impairment (RI) stratified by the serum sodium level in systolic HF patients.The Clinical Characteristics and Outcomes in Relation with Serum Sodium Level in Asian Patients Hospitalized for Heart Failure (the COAST) Study enrolled hospitalized systolic HF patients (ejection fraction<45%) in South Korea, Taiwan, and China. Twelve-month mortality was stratified according to the renal function and serum sodium level.Of 1462 enrolled patients, 716 patients (49%) had RI (GFR<60mL/min/1.73 m(2)), and they had higher 12-month mortality than those without RI (22.8% vs. 10.9%, P<0.001). Furthermore, 676 patients (46%) had low sodium level defined as Na