Clinical Trials Logo

Clinical Trial Summary

This protocol focuses on the development of a noninvasive method of early coronary artery disease detection in diabetes. The overall hypothesis is that risk factors for the metabolic syndrome will predict invasive findings on intravascular ultrasound (IVUS) and noninvasive findings on cardiac magnetic resonance (CMR) perfusion imaging. Secondary objectives will include demonstrating the relative importance of individual risk factors early in disease, demonstrating the positive effects of aggressive risk factor modification on disease, demonstrating the relative importance of treatment of individual risk factors on disease progression or stabilization, and that invasive findings on IVUS will predict noninvasive findings with CMR. Such techniques may allow earlier noninvasive detection of disease as well as tailor treatment early in the disease process making prevention more cost effective.

The specific aims of this proposal are as follows:

1. To assess whether risk factors for coronary artery disease, both known and novel, predict quantitative and qualitative plaque characteristics on IVUS and alterations in myocardial blood flow on CMR.

2. To assess whether improvements in risk factors through aggressive treatment improve microvascular function as measured by CMR and plaque stabilization and/or regression as measured by IVUS.

3. To assess which risk factors are most predictive early in disease and to demonstrate which risk factors, when treated, provide the most benefit.

4. To assess whether findings on CMR predict findings on IVUS, thus, providing a noninvasive method of early disease detection.


Clinical Trial Description

Type II Diabetes has become an epidemic in the United States. Cardiovascular disease is the most common cause of death in this population and is two to four fold higher than the general population. This increased risk is at least partially attributable to the high prevalence of the metabolic syndrome with its multiple coronary heart disease risk factors including central obesity, hypertension, glucose intolerance, chronic inflammation, and dyslipidemia. However, recent trials have demonstrated that traditional risk factors alone are not completely predictive of disease burden particularly early in the disease process prior to the development of flow-limiting coronary stenoses. Diagnosis and prevention of cardiovascular disease development has, thus, been elusive in this high risk population. It is not entirely clear which factors, known or novel, contribute the most in very early disease and which therapies may be most beneficial.

It has been suggested that microvascular dysfunction, a composite of endothelial dysfunction, abnormal blood cell rheology, and abnormal blood viscosity, precedes the development of overt coronary stenoses and contributes to increased cardiovascular risk very early in disease development. Microvascular reactivity is affected by many aspects of the metabolic syndrome. Commonly used tools may not be adequate to evaluate microvascular function in the heart at baseline or in response to therapy. Myocardial contrast echocardiography (MCE) and cardiac magnetic resonance imaging (CMR) provide noninvasive technology capable of directly measuring microvascular function within the heart. Our preliminary data with these modalities shows significantly reduced microvascular function in diabetes in the absence of distinct coronary stenoses.

Prior to development of stenoses in the coronary arteries, plaque accumulates via positive remodeling preserving the lumen. This can be detected invasively through the use of intravascular ultrasound (IVUS). Coronary CT is a potential noninvasive modality able to assess this early remodeling process, but it requires a substantial radiation dose and iodinated contrast dye. In addition, CT requires calcification to have occurred within the plaque, a finding believed to occur well into the life of the plaque. It is unclear how early plaque development is related to microvascular function and if stabilization or regression of plaque with available therapies improves microvascular function.

The overall hypothesis is that risk factors for the metabolic syndrome will predict invasive findings on IVUS and noninvasive findings on CMR perfusion imaging. Secondary objectives will include demonstrating the relative importance of individual risk factors early in disease, demonstrating the positive effects of aggressive risk factor modification on disease, demonstrating the relative importance of treatment of individual risk factors on disease progression or stabilization, and that invasive findings on IVUS will predict noninvasive findings with CMR. Such techniques may allow earlier noninvasive detection of disease as well as tailor treatment early in the disease process making prevention more cost effective.

The specific aims of this proposal are as follows:

1. To assess whether risk factors for coronary artery disease, both known and novel, predict quantitative and qualitative plaque characteristics on IVUS and alterations in myocardial blood flow on CMR. This will be accomplished by performing IVUS during cardiac catheterization followed by CMR perfusion imaging in subjects at baseline. Risk factors will be assessed by the following methods: history, physical exam, and laboratory testing. As CMR has the ability to detect global dysfunction, as opposed to current commonly used noninvasive techniques, the hypothesis is that risk factors for cardiovascular disease will predict findings on IVUS as well as CMR.

2. To assess whether improvements in risk factors through aggressive treatment improve microvascular function as measured by CMR and plaque stabilization and/or regression as measured by IVUS. Subjects will be treated aggressively according to current American College of Cardiology and American Diabetes Association recommendations in the Diabetes Cardiovascular Clinic and will be reassessed at one year. The hypothesis is that improvement in risk factors will predict improvements in measurements by IVUS and MRI.

3. To assess which risk factors are most predictive early in disease and to demonstrate which risk factors, when treated, provide the most benefit. As the metabolic syndrome is present for as many as 10 years prior to the development of diabetes, the hypothesis is that risk factors associated directly with the metabolic syndrome will be most predictive of disease and disease improvement.

4. To assess whether findings on CMR predict findings on IVUS, thus, providing a noninvasive method of early disease detection. The hypothesis is that MRI will predict findings on IVUS, providing a novel noninvasive mechanism for direct detection of early coronary artery disease. ;


Study Design

Allocation: Non-Randomized, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Diagnostic


Related Conditions & MeSH terms


NCT number NCT00797186
Study type Interventional
Source University of Virginia
Contact Angela M Taylor
Phone 434-243-9396
Email amt6b@virginia.edu
Status Recruiting
Phase N/A
Start date November 2008
Completion date December 2011

See also
  Status Clinical Trial Phase
Completed NCT05219994 - Targeting the Carotid Bodies to Reduce Disease Risk Along the Diabetes Continuum N/A
Completed NCT04056208 - Pistachios Blood Sugar Control, Heart and Gut Health Phase 2
Completed NCT02284893 - Study to Evaluate the Efficacy and Safety of Saxagliptin Co-administered With Dapagliflozin in Combination With Metformin Compared to Sitagliptin in Combination With Metformin in Adult Patients With Type 2 Diabetes Who Have Inadequate Glycemic Control on Metformin Therapy Alone Phase 3
Completed NCT04274660 - Evaluation of Diabetes and WELLbeing Programme N/A
Active, not recruiting NCT05887817 - Effects of Finerenone on Vascular Stiffness and Cardiorenal Biomarkers in T2D and CKD (FIVE-STAR) Phase 4
Active, not recruiting NCT05566847 - Overcoming Therapeutic Inertia Among Adults Recently Diagnosed With Type 2 Diabetes N/A
Recruiting NCT06007404 - Understanding Metabolism and Inflammation Risks for Diabetes in Adolescents
Completed NCT04965506 - A Study of IBI362 in Chinese Patients With Type 2 Diabetes Phase 2
Recruiting NCT06115265 - Ketogenic Diet and Diabetes Demonstration Project N/A
Active, not recruiting NCT03982381 - SGLT2 Inhibitor or Metformin as Standard Treatment of Early Stage Type 2 Diabetes Phase 4
Completed NCT04971317 - The Influence of Simple, Low-Cost Chemistry Intervention Videos: A Randomized Trial of Children's Preferences for Sugar-Sweetened Beverages N/A
Completed NCT04496154 - Omega-3 to Reduce Diabetes Risk in Subjects With High Number of Particles That Carry "Bad Cholesterol" in the Blood N/A
Completed NCT04023539 - Effect of Cinnamomum Zeylanicum on Glycemic Levels of Adult Patients With Type 2 Diabetes N/A
Recruiting NCT05572814 - Transform: Teaching, Technology, and Teams N/A
Enrolling by invitation NCT05530356 - Renal Hemodynamics, Energetics and Insulin Resistance: A Follow-up Study
Completed NCT04097600 - A Research Study Comparing Active Drug in the Blood in Healthy Participants Following Dosing of the Current and a New Formulation (D) Semaglutide Tablets Phase 1
Completed NCT03960424 - Diabetes Management Program for Hispanic/Latino N/A
Completed NCT05378282 - Identification of Diabetic Nephropathy Biomarkers Through Transcriptomics
Active, not recruiting NCT06010004 - A Long-term Safety Study of Orforglipron (LY3502970) in Participants With Type 2 Diabetes Phase 3
Completed NCT03653091 - Safety & Effectiveness of Duodenal Mucosal Resurfacing (DMR) Using the Revita™ System in Treatment of Type 2 Diabetes N/A