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Research Article: Prognostic significance of FT3 levels in hypertrophic cardiomyopathy patients with HFpEF

Date Published: 2025-08-21

Abstract:
This study sought to identify key prognostic factors in patients with hypertrophic cardiomyopathy (HCM) and heart failure with preserved ejection fraction (HFpEF), emphasizing the prognostic role of free triiodothyronine (FT3) levels. This retrospective cohort study enrolled 992 HCM-HFpEF patients from two Chinese medical centers between 2009 and 2019, excluding those with thyroid-affecting medications or disorders. Data on demographic and clinical variables, including FT3, were analyzed using univariate and multivariate Cox regression, Kaplan–Meier (KM) survival analysis, and restricted cubic spline (RCS) analysis to explore prognostic factors and FT3's nonlinear predictive value. Age, atrial fibrillation, and NT-proBNP levels significantly influenced prognosis, while FT3 emerged as an independent predictor of all-cause mortality and cardiac transplantation ( P <?0.001). Patients with lower FT3 exhibited poorer long-term outcomes, with RCS identifying a critical threshold of 2.885?pg/ml ( P -non-linear?<?0.05). FT3 is a robust prognostic marker in HCM-HFpEF patients, supporting its integration into risk stratification. Clinicians should monitor FT3 levels, though intervention efficacy requires further prospective validation.

Introduction:
Heart Failure (HF) is a chronic, progressive condition in which the heart cannot pump enough blood to meet the body's needs. HF remains a leading cause of global morbidity and mortality, affecting approximately 1%–2% of the population worldwide. The prognosis of HF varies widely, underscoring the critical need to identify prognostic factors to guide clinical decisions and enhance patient outcomes. Identifying these factors is vital for stratifying patients by risk of adverse events, tailoring individualized…

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