Imaging tests, such as magnetic resonance imaging (MRI), can provide information about
heart and blood vessels. The tests let doctors can see the amount of blood vessel narrowing
and vessel wall thickness. This information may help diagnose and treat heart disease and
other conditions that lead to heart attacks. Better MRI methods are needed to improve heart
disease diagnosis, especially by avoiding the use of radiation. Researchers are testing new
techniques to improve the quality of heart MRI, compared with more complex studies like
catheterization or angiography.
Objectives
To compare heart MRI techniques with other tests used to diagnose heart disease.
Eligibility
People at least 18 years of age who either have or may have heart disease, or are healthy
volunteers.
Design
Participants will be screened with a physical exam, medical history, and blood tests.
They will have an angiography to study the inside of blood vessels. This test is an
x-ray study of the blood vessels. It will be done either separately or as part of a set
of tests to diagnose possible heart disease.
Participants will have at least one and up to five MRI scans. The scans will involve
different methods of studying the heart and blood vessels. Participants may also have a
computed tomography scan to confirm the findings of an MRI scan.
No treatment will be provided as part of this protocol.
Description
Specialized imaging techniques now available allow a unique opportunity to characterize the
micro-environment of the human body. Magnetic Resonance (MR) vascular wall imaging and
angiography (MRA) are developing techniques that permit non-invasive evaluation of arterial
and venous structures without the need for x-ray based catheter angiography. In addition,
vessel wall imaging provides unprecedented non-invasive tools to assess vascular endothelial
function. While dramatic progress has been made to cardiovascular MR imaging in the last few
years, there are still substantial limitations in the resolution, accuracy, and
reproducibility of MRA and wall imaging in the comprehensive structural and functional
evaluation of coronary artery. The first aim of this study is to develop and optimize
clinical imaging protocols and techniques for fast high-resolution coronary MRA and wall
imaging for the assessment of coronary and other main arteries structural, distensibility,
and endothelial functional parameters. Technique optimization and performance evaluation will
be accomplished in normal subjects without known or suspected coronary atherosclerosis. The
second aim of this protocol is to evaluate early MR imagery signs of arterial structural,
distensibility, and endothelial functional disorders associated with atherosclerosis in a
cohort of patients with known or suspected coronary atherosclerosis. Results from accelerated
high-resolution MRA will be correlated with corresponding Computerized Tomography Coronary
Angiogram (CTA) results. The third aim of this protocol is to develop, implement, and
optimize new non-invasive methods for characterization of the micro-environment in the
thoracic and abdominal area utilizing specialized techniques such as MR Spectroscopy, MR
Elastography, and blood oxygenation level dependent (BOLD) imaging. The long-term objective
of this study and research initiative is to optimize coronary MRA, wall, and body imaging
techniques to the point that it can reliably be used for routine prevention and assessment of
early atherosclerosis and other diseases.
Details
Condition
NIDDM,
Diabetes Mellitus,
adiposity,
Obesity,
Arterial Occlusive Disease,
Atherosclerosis,
Arteriosclerosis,
Diabetes Mellitus, Type 2,
Diet and Nutrition,
healthy,
Chronic Diarrhea,
Skin Wounds,
Chronic Shoulder Pain,
Diabetes Prevention,
Vaginal Atrophy,
Adverse Effects, Drugs,
Injection Port,
Breast Cancer - HER2 Positive,
Anal Dysplasia,
Primary Immunodeficiency,
Pediatric Health,
Diabetes Mellitus Types I and II,
Near-Sighted Corrective Surgery,
Healthy Volunteers,
Peripheral Arterial Occlusive Disease,
Brain Function,
Recurrent Respiratory Papillomatosis,
Razor Bumps (Pseudofolliculitis Barbae),
Diabetes (Pediatric),
Occlusions,
Metastatic Triple-Negative Breast Cancer,
Diabetes Mellitus Type 2,
Diabetes,
type 2 diabetes mellitus,
diabetes mellitus (dm),
type 2 diabetes,
type ii diabetes,
noninsulin-dependent diabetes mellitus,
diabetes type 2
Treatment
MR Imagining Techniques
Clinical Study Identifier
NCT01399385
Sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.
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