Technical Development of Interventional Cardiovascular Magnetic Resonance Imaging in Normal Volunteers

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. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT00720460
Recruitment Status : Recruiting
First Posted : July 22, 2008
Last Update Posted : March 29, 2018
Information provided by (Responsible Party):
National Institutes of Health Clinical Center (CC) ( National Heart, Lung, and Blood Institute (NHLBI) )

Brief Summary:

This study will test new techniques to image the heart, blood vessels, and legs using magnetic resonance imaging (MRI). The techniques will be used to plan and guide treatments using minimally invasive methods.

Healthy normal volunteers 18 years of age and older may be eligible for this study.

For MRI, the subject lies flat on a table that can slide in and out of the scanner, a metal cyclinder. Special antennas, covered in pads, are placed against the subject s body. The scan time can vary from 20 minutes to 2 hours, with most scans lasting between 45 and 90 minutes. The subject may be asked to wear adhesive patches on the chest for monitoring the heart and a belt or finger pad for monitoring breathing. During the test, a contrast agent called gadolinium may be injected. This substance brightens the heart and arteries during the scan, providing a better picture of blood flow.

During the procedure, subjects may be asked to exercise their legs on a machine to evaluate the effects of motion and exercise on the MRI exam.

Large blood pressures cuffs may be placed on either or both thighs or calves to try to measure arterial flow to the legs. The cuffs are inflated to a pressure as high as at least 50 mmHg higher than thesubject s systolic blood pressure (up to 250 mmHg) for up to 10 minutes.

Subjects may be asked to return for repeated scans.

Condition or disease

Detailed Description:
We will evaluate new developments in fast magnetic resonance imaging (MRI) of the heart and blood vessels on healthy volunteers. These studies will be conducted in the NIH MRI systems located at the NIH Clinical Center in Bethesda, Maryland. These procedures may involve the intravenous administration of commercially available MR contrast media, supine exercise or the inflation of blood pressure cuffs on the lower extremities during the MRI imaging. The results will be used to evaluate the performance of various research pulse sequences, gradient coils, and radiofrequency receiver coils on human subjects and will provide essential ground work for specific patient protocols, both diagnostic and therapeutic.

Study Type : Observational
Estimated Enrollment : 250 participants
Observational Model: Case-Only
Time Perspective: Prospective
Official Title: Technical Development of Interventional Cardiovascular Magnetic Resonance Imaging in Healthy Volunteers
Study Start Date : July 18, 2008

Resource links provided by the National Library of Medicine

MedlinePlus related topics: MRI Scans

Healthy Volunteers

Primary Outcome Measures :
  1. To develop and test new and incremental approaches to fast cardiovascular MRI in healthy human subjects. (healthy volunteers) [ Time Frame: Day of study ]
    There are 24 objectives listed in the protocol as potential outcomes.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 99 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
  • Healthy adult volunteers, age is greater than 18 years of age, who consent to participate in writing


  • Cardiac pacemaker or implantable defibrillator
  • Cerebral aneurysm clip
  • Implanted neural stimulator (e.g. TENS-Unit)
  • Any type of ear or cochlear implant
  • Intra-ocular foreign body (e.g. metal shavings)
  • Any implanted device (e.g. insulin pump, drug infusion device)
  • Metal shrapnel or bullet
  • Morbid obesity
  • Claustrophobia

    3. EXCLUSION CRITERIA: Contrast media risk:

  • Pregnant women (when uncertain, subjects will undergo urine or blood testing) or lactating women
  • Known hemoglobinopathy
  • Known kidney disease
  • Exposure to gadolinium MRI contrast agents in the past 18 hours, if the study requires gadolinium MRI contrast agent.
  • Diabetes
  • Children are not included.

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 identifier (NCT number): NCT00720460

Contact: Annette Stine, R.N. (301) 402-5558
Contact: Robert J Lederman, M.D. (301) 402-6769

United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike Recruiting
Bethesda, Maryland, United States, 20892
Contact: For more information at the NIH Clinical Center contact Office of Patient Recruitment (OPR)    800-411-1222 ext TTY8664111010   
Sponsors and Collaborators
National Heart, Lung, and Blood Institute (NHLBI)
Principal Investigator: Robert J Lederman, M.D. National Heart, Lung, and Blood Institute (NHLBI)

Additional Information:
Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: National Heart, Lung, and Blood Institute (NHLBI) Identifier: NCT00720460     History of Changes
Other Study ID Numbers: 080185
First Posted: July 22, 2008    Key Record Dates
Last Update Posted: March 29, 2018
Last Verified: February 1, 2018

Keywords provided by National Institutes of Health Clinical Center (CC) ( National Heart, Lung, and Blood Institute (NHLBI) ):
Magnetic Resonance Imaging
Minimally Invasive Therapy
Transcatheter Therapeutics
Healthy Volunteers
Gadolinium Contrast
Healthy Volunteer