Peripheral Endothelial Function and Coronary Status in Asymptomatic Diabetic Patients

Study Overview
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Brief Summary
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Silent myocardial ischemia is usual in type 2 diabetic patients and associated with coronary stenoses and endothelial dysfunction or both. We therefore hypothesized that peripheral endothelial dysfunction is a marker of silent myocardial ischemia. The aim of the study is, in 120 asymptomatic type 2 diabetic patients, to evaluate the relations between coronary status, assessed with myocardial scintigraphy and subsequent coronary angiography in case of abnormality, and peripheral endothelial function, according to post-occlusive hyperaemia endothelium-dependent brachial artery dilation.

Detailed Description
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Coronary microcirculation, non invasively assessed with trans-thoracic echo-doppler (coronary blood flow before and after cold pressure testing), and biochemical markers of endothelial dysfunction will also be measured. Correlations between peripheral and coronary endothelial functions will be checked. The measurements will be performed and validated in two other groups 30 patients with overweight but free of diabetes, matched with the patients with diabetes for age, gender and body mass index 30 control subjects.Reproducibility of the methods will be assessed in 10 patients of the three groups of subjects.

Official Title
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Peripheral Endothelial Function and Coronary Status in Asymptomatic Type 2 Diabetic Patients: Relations With Coronary Microcirculation Assessed With Trans-thoracic Echo-doppler

Conditions
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Myocardial Ischemia

Participation Criteria
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Eligibility Criteria
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Inclusion criteria : FOR TYPE 2 DIABETIC PATIENTS Asymptomatic: with normal resting ECG coronary primary prevention other cardiovascular risk factors justifying screening for silent myocardial ischemia and coronary stenoses in case of silent myocardial ischemia. FOR PATIENTS WITH OVERWEIGHT: Asymptomatic with normal resting ECG coronary primary prevention Body mass index 25-40 kg/m² Without diabetes. CONTROLS Asymptomatic: coronary primary prevention Body mass index 18-25 kg/m² Without diabetes Without cardiovascular risk factors including dyslipidemia, hypertension, smoking habits, No treatment Exclusion criteria : pregnancy renal failure acrosyndrome

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 70 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| 1<br> | |
| 2<br> | |
| 3<br> | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Post-occlusive hyperaemia endothelium-dependent brachial artery dilation |  | immediate | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| noninvasive coronary microcirculation assessed with transthoracic ECHODOPPLER |  | immediate | 
| cardiac autonomic neuropathy |  | immediate | 
| cardiac transthoracic echography |  | immediate | 
| biologic markers of endothelial function |  | immediate | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Type 2 diabetes, silent myocardial ischemia, endothelial function