The goal of this observational study is to investigate the prevalence and associated factors of frailty in hospitalized elderly patients with heart failure. The main questions it aims to answer are:(1) To clarify differences in demographic characteristics and test results (including CGA, BNP, and echocardiography) among different frail populations (2) What demographic, clinical, and geriatric assessment factors are independently associated with frailty in elderly patients with heart failure?
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Clinical Frail Scale (CFS) score
Timeframe: Baseline
brain natriuretic peptide (BNP)
Timeframe: Baseline
left ventricular ejection fraction (LVEF) value
Timeframe: Baseline