Interaction Between Frailty and Renal Function in Patients with Heart Failure.

Area of Science:

• Cardiology
• Nephrology
• Geriatrics

Background:

• Frailty is prevalent in heart failure (HF) patients, predicting poor outcomes.
• Chronic kidney disease (CKD) often coexists with HF, potentially exacerbating frailty and risk.
• The interplay between frailty and CKD in HF outpatients requires further characterization.

Purpose of the Study:

• To determine the prevalence and clinical factors associated with frailty in HF outpatients.
• To assess the prognostic impact of frailty across different stages of CKD.
• To investigate the combined effect of frailty and CKD on adverse cardiovascular events.

Main Methods:

• Prospective observational cohort study of 459 HF outpatients.
• Frailty assessed using Fried's phenotype (≥3 criteria).
• Logistic regression for frailty correlates; Cox models for outcomes (mortality/HF hospitalization) and CKD interaction.

Main Results:

• Frailty prevalence was 39.9%, increasing with CKD severity (14% to 48%).
• Independent predictors of frailty included older age, stroke history, higher CA125, and lower eGFR.
• Frail patients faced doubled risk of death/HF hospitalization (aHR 2.09), amplified 5-fold with advanced CKD.

Conclusions:

• Frailty is common in HF outpatients and strongly associated with renal dysfunction.
• Advanced CKD significantly amplifies the adverse prognosis of frailty in HF.
• Integrated assessment of frailty and renal function is crucial for risk stratification and personalized HF treatment.