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Diabetes and the heart: coronary heart disease
Insights
Diabetics face higher risks of coronary heart disease (CHD) events and mortality compared to non-diabetics. This increased risk, especially in insulin-dependent women, is not fully understood but warrants proactive management strategies.
Area of Science:
- Cardiology
- Endocrinology
- Public Health
Background:
- Diabetes mellitus significantly elevates the risk of coronary heart disease (CHD) events and mortality compared to age-matched non-diabetic individuals.
- This heightened risk is particularly pronounced in insulin-dependent female diabetics, who appear to lose the protective cardiovascular benefits typically observed in women.
Purpose of the Study:
- To investigate the increased risk of cardiovascular events and mortality in diabetic patients.
- To explore potential causes and contributing factors to the excess cardiac morbidity and mortality in diabetes.
- To review current understanding of therapeutic interventions for managing cardiac risk in diabetics.
Main Methods:
- Review of epidemiological data on CHD risk in diabetic versus non-diabetic populations.
- Analysis of risk factors associated with cardiovascular complications in diabetes.
- Examination of potential non-coronary cardiac pathologies in diabetic patients.
Main Results:
- Diabetics exhibit a substantially greater risk of experiencing and succumbing to CHD events.
- Insulin-dependent female diabetics show a loss of usual gender-based protection against CHD.
- Cardiac morbidity and mortality in some insulin-dependent diabetics may stem from cardiomyopathy due to vascular disease or metabolic dysfunction, not solely CHD.
Conclusions:
- The precise causes of excess cardiac risk in diabetics remain unidentified, though multiple risk factors likely contribute.
- While no therapy has been definitively proven to reduce cardiac risk, a proactive approach including lipid-lowering diets, blood sugar control, hypertension management, and smoking cessation is advisable.
Abstract:
1. Diabetics have a greater risk of experiencing and of dying from a CHD event than age matched non-diabetics. 2. The excess risk is particularly notable in insulin dependent female diabetics who seem to lose the usual 'protection' accorded to women. 3. The cause or causes of the excess risk are not known. There are a variety of 'risk factors' observed in diabetics which, in sum, may contribute. 4. At least in insulin-dependent diabetics some cardiac morbidity and mortality may also be due, not to coronary heart disease, but to a cardiomyopathy secondary to intramural obstructive vascular disease and/or disordered myocardial metabolism. 5. No therapy has yet been convincingly proved to reduce (or to increase) the risk of cardiac morbidity or mortality. Nevertheless, in treating diabetics there is an a priori case for using diets designed to lower plasma lipid levels as well as the blood sugar, for early treatment of hypertension and for discouraging cigarette smoking.