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Published on: June 11, 2012
Early Post-discharge Glycemic Control and Cardiovascular Event Readmission in Patients With Heart Failure and Type 2
Hong Xu1, Yuhua Ma1, Xiaofei Han1
1Department of Endocrinology, Affiliated Xiaoshan Hospital, Hangzhou Normal University.
Insights
Optimizing glycemic control within three months after hospital discharge significantly reduces cardiovascular event readmissions in heart failure patients with type 2 diabetes. Early HbA1c monitoring is crucial for predicting and preventing these readmissions.
Area of Science:
- Cardiology
- Endocrinology
- Public Health
Background:
- Heart failure (HF) and type 2 diabetes mellitus (T2DM) significantly increase cardiovascular event readmission risk.
- Optimal glycemic control thresholds for preventing readmissions in HF-T2DM patients remain unclear.
Purpose of the Study:
- To investigate the association between early glycemic control (3-month HbA1c) and cardiovascular event readmissions in HF patients with T2DM.
- To identify optimal glycemic control targets for reducing hospital readmissions.
Main Methods:
- Retrospective cohort study of 160 adult HF patients with T2DM.
- Patients categorized by 3-month post-discharge HbA1c: poor control (≥7.0%) vs. good control (<7.0%).
- Kaplan-Meier survival analysis, Cox regression, and Fine-Gray competing-risk models used to assess readmission predictors.
Main Results:
- 35% of patients were readmitted within one year, primarily for HF exacerbation, myocardial infarction, and arrhythmias.
- Poor glycemic control (HbA1c ≥7.0%) was associated with significantly higher readmission rates (58.8% vs. 17.4%, p<0.001).
- Three-month HbA1c independently predicted cardiovascular event readmission (HR=3.41, p<0.001).
Conclusions:
- Early glycemic control, specifically 3-month HbA1c, is a potent predictor of cardiovascular readmission in HF patients with T2DM.
- Achieving good glycemic control (<7.0%) within three months post-discharge may substantially lower readmission risk.
- Targeted glycemic management in the early post-discharge period is vital for improving clinical outcomes.
Abstract:
Background Heart failure (HF) patients with type 2 diabetes mellitus (T2DM) are at high risk of hospital readmission due to cardiovascular events. Glycemic control may play a key role in reducing this risk, but the optimal glycemic control threshold for preventing readmissions remains unclear.Material and methods This single-center, retrospective cohort study included 160 adult patients with HF and type 2 diabetes mellitus (T2DM). Patients were classified into two groups based on HbA1c measured 3 months after discharge: poor glycemic control (HbA1c ≥ 7.0 %) and good glycemic control (HbA1c < 7.0 %). Data were collected from electronic medical records, and cardiovascular event readmissions were tracked over a one-year follow-up period. Kaplan-Meier event-free survival (EFS) analysis and Cox regression models were used to examine the relationship between the three-month HbA1c and cardiovascular event readmission. A Fine-Gray competing-risk model was additionally applied to provide a more robust estimate of the cumulative incidence of cardiovascular readmission.Results Among the 160 patients, 56 (35 %) were readmitted due to cardiovascular events, including HF exacerbation (39.3 %), myocardial infarction (25.0 %), arrhythmias (14.3 %), and coronary artery disease (8.9 %). Their median EFS time was 121 days. The readmission rate was significantly higher in patients with poor glycemic control (HbA1c ≥7.0 %), with 58.8 % of the patients being readmitted compared to 17.4 % in the group with good glycemic control (HbA1c <7.0 %, p<0.001). Kaplan-Meier EFS analysis confirmed a significantly shorter EFS in patients with poor glycemic control. Cox regression analysis identified the three-month HbA1c value as an independent predictor of cardiovascular event readmission (HR=3.41, 95 % CI 2.15-5.29, p<0.001), which was consistent with the Fine-Gray competing-risk analysis (sub-distribution HR = 3.12, 95 % CI 1.95-4.98, p<0.001).Conclusion Early glycemic control, particularly the three-month HbA1c value, is a strong predictor of cardiovascular event readmission in HF patients with DM. Optimizing glycemic control within the first three months post-discharge may significantly reduce readmission risk and improve clinical outcomes.
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