Diabetic endovascular disease: role of coronary artery revascularization
Kenneth E Stone1, Elaine Chiquette, Robert J Chilton
1Brooke Army Medical Center, Fort Sam Houston, Texas, USA.
Insights
Diabetes patients face accelerated atherosclerosis and coronary artery disease. Identifying silent ischemia and determining optimal revascularization strategies remain critical challenges for clinicians.
Area of Science:
- Cardiology
- Endocrinology
- Vascular Biology
Background:
- Diabetes mellitus pandemic is linked to accelerated atherosclerosis.
- Asymptomatic diabetic patients often present with advanced coronary artery disease and silent ischemia.
- Diabetic endovascular disease exhibits multiple high-risk features promoting atherosclerosis and occlusion.
Purpose of the Study:
- To address the challenge of identifying asymptomatic diabetic patients with significant coronary ischemia.
- To review the optimal revascularization strategies for diabetic patients with coronary disease.
- To highlight the need for evidence-based guidance in managing diabetes-related cardiovascular complications.
Main Methods:
- Review of current clinical challenges in asymptomatic diabetic patients.
- Discussion of pathophysiological mechanisms of diabetic endovascular disease.
- Analysis of the evolving landscape of revascularization strategies, including drug-eluting stents and coronary artery bypass grafting.
- Mention of ongoing clinical trials (BARI 2D, FREEDOM, CARDia) investigating optimal management.
Main Results:
- Diabetic patients exhibit extensive coronary atherosclerosis, reduced ejection fractions, and higher rates of silent ischemia.
- Hyperglycemia-induced endothelial dysfunction, impaired fibrinolysis, and increased platelet aggregation contribute to disease progression.
- The role of coronary artery bypass grafting may be impacted by advancements like drug-eluting stents, though evidence is limited.
Conclusions:
- Accurate identification of significant coronary ischemia in asymptomatic diabetics is crucial for timely intervention.
- Optimal revascularization strategies require further evidence from randomized controlled trials.
- Comprehensive management includes lifestyle modification, early prevention, and global risk reduction.
Abstract:
This century brings a pandemic of diabetes mellitus, with marked increases in early-accelerated atherosclerosis. When asymptomatic patients with diabetes present for evaluation, they have more extensive coronary atherosclerosis, lower ejection fractions, higher rates of previous cardiac events, and more silent ischemia than the normal population. The challenge faced by clinicians is to accurately identify asymptomatic patients with diabetes who have significant coronary ischemia that would benefit from revascularization. Diabetic endovascular disease has all the high-risk features to promote atherosclerosis and coronary occlusion: hyperglycemia-induced endothelial dysfunction, impaired fibrinolysis, increased platelet aggregation, plaque instability, dysfunctional arterial remodeling, and fibrotic and calcified coronary arteries. The optimal revascularization strategy for patients with diabetes is an ongoing debate. The advent of drug-eluting stents has changed the landscape, and some have suggested that the current role of coronary artery bypass grafting may be reduced by as much as 46%. Unfortunately, there is limited evidence from randomized, controlled trials that reflects current practice and could guide clinicians in making the best choices for patients with diabetes and coronary disease. It is hoped that ongoing trials--including Bypass Angioplasty Revascularization Investigation 2 Diabetes (BARI 2D), Future Revascularization Evaluation in Patients with Diabetes Mellitus: Optimal Management of Multivessel Disease (FREEDOM), and Coronary Artery Revascularisation in Diabetes (CARDia)--will answer many of the remaining questions. Still, the best treatment includes lifestyle modification and early prevention strategies with global risk reduction.
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