Background
Estimated glomerular filtration rate (eGFR) and urine albumin-to-creatinine ratio are complementary domains of kidney disease staging and independently associated with heart failure (HF) progression.
Objectives
The purpose of this study was to evaluate whether the efficacy and safety of finerenone varies according to kidney risk among patients with HF with mildly reduced or preserved ejection fraction.
Methods
In this prespecified analysis of FINEARTS-HF (Finerenone Trial to Investigate Efficacy and Safety Superior to Placebo in Patients with Heart Failure), clinical outcomes and treatment effects of finerenone on the primary endpoint (cardiovascular death and total [first and recurrent] HF events) and key secondary endpoints were evaluated according to baseline KDIGO (Kidney Disease: Improving Global Outcomes) risk category (low, moderately increased, and high or very high). Key exclusion criteria in FINEARTS-HF were eGFR <25 mL/min/1.73 m2 or serum potassium >5.0 mmol/L.
Results
Overall, 5,797 (97%) FINEARTS-HF participants had classifiable KDIGO risk category at baseline, of whom 2,022 (35%), 1,688 (29%), and 2,087 (36%) were low, moderate, and high/very high risk, respectively. Over a median follow-up of 2.7 years, higher kidney risk was associated with a higher rate of primary outcome events, with similar findings for other key endpoints, including the composite kidney outcome, new-onset atrial fibrillation, and vascular events. Benefits of finerenone vs placebo on the primary endpoint (Pinteraction = 0.24) and Kansas City Cardiomyopathy Questionnaire–Total Symptom Score at 12 months (Pinteraction = 0.36) were consistent irrespective of baseline kidney risk category. Participants with higher kidney risk experienced greater reductions in urine albumin-to-creatinine ratio after 6 months (Pinteraction = 0.031), without differences in eGFR slope. Risks of safety events, including hyperkalemia, with finerenone vs placebo were not enhanced among participants with higher kidney risk.
Conclusions
Finerenone appears to consistently improve clinical outcomes, HF-related health status, and albuminuria across a broad spectrum of kidney risk in patients with HF with mildly reduced or preserved ejection fraction. (Finerenone Trial to Investigate Efficacy and Safety Superior to Placebo in Patients with Heart Failure [FINEARTS-HF]; NCT04435626)
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