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Published on: June 10, 2025
Prevalence and prognostic implications of pre-diabetic state in patients with heart failure
Yuya Matsue1, Makoto Suzuki, Rena Nakamura
1Department of Medicine, Kameda Medical Center, Chiba, Japan. yuyam@kameda.jp
Insights
Pre-diabetic states like impaired glucose tolerance (IGT) and diabetes mellitus (DM) worsen outcomes for heart failure (HF) patients. Screening for these conditions using oral glucose tolerance tests (OGTT) can help identify high-risk individuals.
Area of Science:
- Cardiology
- Endocrinology
- Metabolic Disorders
Background:
- Diabetes mellitus (DM) is a known risk factor for poor prognosis in heart failure (HF) patients.
- The prognostic impact and prevalence of pre-diabetic states in HF are not well understood.
Purpose of the Study:
- To investigate the prevalence and prognostic significance of glucose metabolism abnormalities, including pre-diabetes, in patients with heart failure.
- To assess the association between different glucose tolerance categories and major adverse cardiac and cerebrovascular events (MACCE) in HF patients.
Main Methods:
- A prospective study included 136 consecutive HF patients without previously diagnosed DM.
- The 75-g oral glucose tolerance test (OGTT) classified patients into normal glucose tolerance (NGT), impaired fasting glucose (IFG), impaired glucose tolerance (IGT), and newly diagnosed DM groups.
- Major adverse cardiac and cerebrovascular events (MACCE) were monitored during follow-up.
Main Results:
- Of 94 patients without known DM, 37.2% had NGT, 9.6% had IFG, 39.4% had IGT, and 13.8% were newly diagnosed with DM.
- Patients with DM or IGT showed significantly lower MACCE-free rates compared to NGT patients (P=0.006 and P=0.036, respectively).
- IFG was not significantly associated with increased MACCE risk, but IGT (HR, 4.51; P=0.011) and DM (HR, 4.74; P=0.005) were independent predictors of MACCE.
Conclusions:
- Impaired glucose tolerance (IGT) and diabetes mellitus (DM) significantly contribute to an adverse prognosis in heart failure patients.
- Diabetes screening via OGTT is feasible and valuable for risk stratification in HF patients.
Background:
Diabetes mellitus (DM) is a risk factor of poor prognosis in patients with heart failure (HF). The prevalence and prognostic impact of the pre-diabetic state, however, are not well understood.
Methods And Results:
One hundred and thirty-six consecutive patients admitted due to HF were included in this prospective study. The 75-g oral glucose tolerance test (OGTT) was performed in all patients without known DM, and patients were classified into normal glucose tolerance (NGT), impaired fasting glucose (IFG), impaired glucose tolerance (IGT), and DM groups. Forty-two of the 136 patients had previously been diagnosed with diabetes. Of the remaining 94 patients without known diabetes, 35 (37.2%) patients were classified as NGT, 9 (9.6%) as having IFG, 37 (39.4%) were classified as having IGT, and 13 (13.8%) were newly diagnosed with DM. During follow-up, patients with DM or IGT had significantly lower major adverse cardiac and cerebrovascular event (MACCE)-free rates than NGT patients (P=0.006, P=0.036, respectively). IFG, however, was not significantly related to increased MACCE risk. The presence of IGT (hazard ratio [HR], 4.51; P=0.011) and DM (HR, 4.74; P=0.005) were independent predictors of MACCE even after multivariate analysis.
Conclusions:
IGT and DM contribute to adverse prognosis in patients with HF. It is feasible to perform diabetes screening using OGTT in patients with HF for risk stratification.
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