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[Coronary artery disease in diabetic patients]
Insights
Diabetics with ischemic heart disease (IHD) show more severe coronary artery disease, with higher rates of multiple diseased vessels compared to non-diabetics. However, severe blockages (>75% stenosis) and coronary spasm were similar between groups.
Area of Science:
- Cardiology
- Diabetology
- Vascular Medicine
Context:
- Diabetes mellitus is a known risk factor for ischemic heart disease (IHD).
- Controversies persist regarding the comparative severity of coronary artery disease (CAD) in diabetic versus non-diabetic individuals with IHD.
Purpose:
- To compare the severity and extent of coronary artery disease in diabetic and non-diabetic patients with established IHD using coronary arteriography.
Summary:
- The study analyzed coronary arteriograms of 50 diabetics and 50 non-diabetics with IHD.
- Diabetics had higher rates of obesity and similar trends for hypertension and hypercholesterolemia, while non-diabetics had higher smoking rates.
- Diabetic patients exhibited a significantly higher incidence of multi-vessel disease (>2 or 3 diseased vessels) and a greater number of coronaries with >50% stenosis per patient.
- No significant difference was observed in the distribution of coronaries with >75% stenosis.
- Coronary spasm was less frequent in diabetics (12%) compared to non-diabetics (28%).
Impact:
- Findings suggest diabetes is associated with more extensive, though not necessarily more severe, coronary artery disease.
- Hypertension and hypercholesterolemia are implicated as contributing factors to the increased multi-vessel disease burden in diabetics.
- Highlights the need for aggressive risk factor management in diabetic patients to mitigate CAD progression.
Abstract:
Although it is well known that diabetics have high mortality rates due to ischemic heart disease (IHD), controversies still exist about the severity of coronary artery disease in diabetics compared to nondiabetics. We compared coronary arteriographies of 50 diabetics with IHD to those of 50 nondiabetics with IHD. In regard to coronary risk factors, incidence of obesity was significantly higher in diabetics. Incidence of hypertension, hypercholesteremia, hyperuricemia was higher, although not significant, in diabetics. Incidence of smoking was significantly higher in nondiabetics. The diabetic group showed a significantly higher incidence of patients with more than two or three diseased vessels, and a significantly higher number of diseased coronaries with more than 50% stenosis per patient compared to nondiabetics (5.6 +/- 3.7 vs 3.7 +/- 3.2). The distribution of diseased coronaries with more than 75% stenosis showed no difference between diabetics and nondiabetics. The incidence of coronary spasm was significantly lower in diabetics (12% vs 28%). The high incidence of multiple vessel disease in diabetics was thought to be due to other complicated coronary risk factors, especially hypertension and hypercholesteremia.