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Magnetic Resonance Angiography (MRA) for the Diagnosis of Atherosclerosis

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT00001841
First Posted: November 4, 1999
Last Update Posted: March 4, 2008
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by:
National Institutes of Health Clinical Center (CC)
  Purpose

Magnetic Resonance Angiography (MRA) is a method used to evaluate arteries and veins without the use of invasive catheters or x-rays (radiation). MRA technique has been continuously improving and has become more accurate at diagnosing problems of narrowing in blood vessels. However, MRA has a difficult time detecting narrowing in small blood vessels, limiting its use to large arteries.

The purpose of this study is to recruit patients diagnosed with or suspected of having, atherosclerosis (hardening of the arteries) to participate in a series of new state-of-the-art diagnostic tests using MRA.

This study is a combined effort between the National Institutes of Health (NIH), Uniformed Services University of the Health Sciences (USUHS), and General Electric Medical Services and is supported a Cooperative Research Agreement is to (CRADA).

The goal of this study is to improve MRA to the point that it can reliably replace diagnostic x-ray catheter angiography in the evaluation of patients with atherosclerosis.


Condition
Atherosclerosis

Study Type: Observational
Official Title: Contrast Enhanced Resonance Angiography (MRA) in the Diagnosis of Atherosclerotic Disease: A Pilot Technical Development Study

Resource links provided by NLM:


Further study details as provided by National Institutes of Health Clinical Center (CC):

Estimated Enrollment: 100
Study Start Date: March 1999
Estimated Study Completion Date: December 2004
Detailed Description:
Contrast Enhanced Magnetic Resonance Angiography (MRA) is a developing technology that permits the non-invasive evaluation of arterial and venous structures without the need for x-ray based catheter angiography. While dramatic progress has been made in the last few years, there are still substantial limitations in the accuracy of MRA in judging stenoses and detecting small accessory vessels. The purpose of this study is to recruit patients with suspected or documented atherosclerotic disease for evaluation with state-of-the-art MRA using new surface coils, new pulse sequence designs, novel contrast administration strategies, and advanced image processing algorithms. This work represents a collaboration between NIH, USUHS and General Electric Medical Systems and is supported by a Cooperative Research Agreement (CRADA). The goal of this pilot study is to improve MRA to the point that it can reliably replace diagnostic x-ray catheter angiography in the evaluation of patients with atherosclerotic disease.
  Eligibility

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

INCLUSION CRITERIA:

Patients must live in the Metropolitan Washington Area.

Patients must have suspected atherosclerotic disease based on clinical findings or documented by angiography or doppler ultrasound performed within 3 months of the MRA.

Patients must be willing to participate in the protocol.

Patients must be referred by a physician who is caring for the patient and to whom the results will be provided.

Patients must be clinically stable and be judged by their physician able to come to the Clinical Center to participate in the study.

Patients must have serum Creatinine value less than 3.0 mg/dl.

EXCLUSION CRITERIA:

Any contraindication for MRI including:

(a) pacemaker or other implanted electronic device; (b) cochlear implants; (c) metal in the eye; (d) embedded shrapnel fragments; (e) cerebral aneurysm clips; or (f) medical infusion pumps.

Allergy to Gadolinium based contrast media.

Unsatisfactory performance status as judged by the referring physician such that the patient could not tolerate an MRI scan. Examples of medical conditions that would not be accepted would include angina, dyspnea at rest, congestive heart failure, severe claudication (less than 1 flight of steps).

Intercurrent illness that requires treatment that would be jeopardized by the MRA scan.

Subjects requiring sedation for MRI studies.

Pregnant female.

Patients with severe back-pain who will be unable to tolerate supine positioning within the MRI scanner for the duration of the examination.

  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00001841


Locations
United States, Maryland
Warren G. Magnuson Clinical Center (CC)
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Institutes of Health Clinical Center (CC)
  More Information

Publications:
ClinicalTrials.gov Identifier: NCT00001841     History of Changes
Other Study ID Numbers: 990061
99-CC-0061
First Submitted: November 3, 1999
First Posted: November 4, 1999
Last Update Posted: March 4, 2008
Last Verified: December 2004

Keywords provided by National Institutes of Health Clinical Center (CC):
Arteriosclerosis
Imaging
MRA
Narrowing of Vessels
Hardening of Arteries

Additional relevant MeSH terms:
Atherosclerosis
Arteriosclerosis
Arterial Occlusive Diseases
Vascular Diseases
Cardiovascular Diseases