4.7 Article

Long-term cardiovascular prognosis of patients with type 1 diabetes after myocardial infarction

Journal

CARDIOVASCULAR DIABETOLOGY
Volume 21, Issue 1, Pages -

Publisher

BMC
DOI: 10.1186/s12933-022-01608-3

Keywords

Myocardial infarction; Type 1 diabetes mellitus; Epidemiology

Funding

  1. Finnish Cultural Foundation
  2. Finnish Foundation for Cardiovascular Research
  3. Paavo Nurmi Foundation

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This study found that patients with type 1 diabetes have significantly poorer long-term cardiovascular prognosis after myocardial infarction compared to patients without diabetes, with a higher incidence of major adverse cardiovascular events. The results highlight the importance of effective secondary prevention after myocardial infarction in patients with type 1 diabetes.
Background To explore long-term cardiovascular prognosis after myocardial infarction (MI) among patients with type 1 diabetes. Methods Patients with type 1 diabetes surviving 90 days after MI (n = 1508; 60% male, mean age = 62.1 years) or without any type of diabetes (n = 62,785) in Finland during 2005-2018 were retrospectively studied using multiple national registries. The primary outcome of interest was a combined major adverse cardiovascular event (MACE; cardiovascular death, recurrent MI, ischemic stroke, or heart failure hospitalization) studied with a competing risk Fine-Gray analyses. Median follow-up was 3.9 years (maximum 12 years). Differences between groups were balanced by multivariable adjustments and propensity score matching (n = 1401 patient pairs). Results Cumulative incidence of MACE after MI was higher in patients with type 1 diabetes (67.6%) compared to propensity score-matched patients without diabetes (46.0%) (sub-distribution hazard ratio [sHR]: 1.94; 95% confidence interval [CI]: 1.74-2.17; p < 0.0001). Probabilities of cardiovascular death (sHR 1.81; p < 0.0001), recurrent MI (sHR 1.91; p < 0.0001), ischemic stroke (sHR 1.50; p = 0.0003), and heart failure hospitalization (sHR 1.98; p < 0.0001) were higher in patients with type 1 diabetes. Incidence of MACE was higher in diabetes patients than in controls in subgroups of men and women, patients aged < 60 and >= 60 years, revascularized and non-revascularized patients, and patients with and without atrial fibrillation, heart failure, or malignancy. Conclusions Patients with type 1 diabetes have notably poorer long-term cardiovascular prognosis after an MI compared to patients without diabetes. These results underline the importance of effective secondary prevention after MI in patients with type 1 diabetes.

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