Abstract 12228: Prognostic Role of Renal Replacement Therapy Among Hospitalized Patients With Heart Failure in the Brazilian National Public Health System

Abstract

Introduction: Data on survival and prognostic factors of patients hospitalized with HF in Brazil are scarce. Aims: To determine the in-hospital all-cause mortality rate, in-hospital renal replacement therapy (RRT) rate, and its association with in-hospital mortality in a population of patients admitted with HF to hospitals from the Brazilian National Public Health System (SUS). Methods: We included adult patients with a documented diagnosis of HF (ICD-10 I50.X) admitted to any public hospital in the SUS Hospital Information System (SIHSUS) registry from April 2017 to August 2021. RRT included intermittent hemodialysis, continuous hemodialysis, and peritoneal dialysis. Descriptive statistics and univariate and multivariate Cox regression were employed. Results: Of the 910,128 HF hospitalizations identified, 106,383 (11.7%) resulted in in-hospital death (Table 1). RRT (required by 8,179 non-survivors [7.7%] and 11,496 survivors [1.4%, p < 0.001]) was associated with a 56% increase in the risk of death (HR 1.56, 95% CI 1.52 - 1.59) (Fig 1). All forms of RRT were independently associated with in-hospital mortality (Fig 2). Female sex (HR 1.04, 95% CI 1.03-1.06) and COVID-19 (HR 1.41, 95% CI 1.14-1.81) were identified as risk factors for in-hospital mortality, while heart transplantation improved survival (HR 0.37, 95% CI 0.29-0.47). Hospitalizations requiring RRT and hospitalizations resulting in death were both longer and costlier (Fig 3, 4). Conclusion: In this nationwide registry of patients admitted with HF to Brazilian public hospitals, we found an alarming mortality rate double the estimates reported in European and North American countries. RRT was strongly associated with a prolonged hospital stay, higher cost-of-hospitalization, and in-hospital death. Our findings highlight the significance of optimizing medical therapy for patients admitted with HF to prevent the deterioration of their renal function and the need for RRT.