Imaging of Totally Blocked Arteries

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. Identifier: NCT00459446
Recruitment Status : Completed
First Posted : April 12, 2007
Last Update Posted : July 2, 2017
Information provided by:
National Institutes of Health Clinical Center (CC)

Brief Summary:

This study will test how well a new contrast agent (dye) used in magnetic resonance imaging (MRI) can help visualize totally blocked arteries that normally supply blood to the neck, arms or legs. Currently used agents work well in visualizing normal or partly blocked arteries (arteries that have some blood flowing through them), but only poorly in totally blocked arteries. This study will see if a contrast agent called gadofosveset can better brighten images of completely blocked arteries. Gadofosveset is approved in Europe for use in MRI scans, but is still considered experimental in the United States.

People 18 years of age or older with known or suspected total blockage of an artery to the neck, arm or leg may be eligible for this study.

Participants undergo MRI scanning with gadofosveset contrast dye. MRI uses a magnetic field and radio waves to produce images of body tissues and organs. For this procedure, the subject lies on a table that can slide in and out of the tubular scanner, wearing earplugs to muffle loud noises that occur during the scanning process. The procedure lasts about 1.5 to 2 hours, during which the subject may be asked to hold his or her breath several times for as long as 5 to 20 seconds. During the procedure, gadofosveset is injected and several kinds of MRI pictures are taken to understand better how the new agent works. Subjects may be asked to undergo a second scan using conventional MRI contrast dye

Condition or disease Intervention/treatment Phase
Atherosclerosis Peripheral Artery Disease Intermittent Claudication Chronic Total Aterial Occlusion Drug: MS-325 Injection (Gadofosveset Trisodium) Phase 1

Detailed Description:

Repairing totally occluded peripheral arteries remains challenging because they are not visualized using available imaging technologies. Contrast-enhanced magnetic resonance angiography (CE-MRA), X-ray computed tomography angiography (CTA), and invasive radiocontrast digital subtraction angiography (DSA) all rely on blood flow within arteries that are not totally occluded. Where the arterial lumen is totally occluded, contrast does not enter and the artery remains invisible. As a result, physicians have difficulty identifying a pathway or trajectory for catheter devices in order to improve blood flow using angioplasty.

Gadofosveset, an albumin-binding MRI contrast agent that is commercially available outside the United States, may accumulate in the walls of occluded arteries through a mechanism that is not known.

The goal of this protocol is to determine whether gadofosveset has value in planning catheter trajectories in totally occluded peripheral arteries. We propose to study the gadofosveset contrast enhancement patterns in occluded peripheral artery segments in up to 20 patients with known occluded iliac, femoral, and shoulder arteries being considered for catheter-based treatment.

This research may have value in planning and conducting minimally invasive treatments using conventional X-ray guidance and possibly in the future using investigational real-time MRI guidance.

Study Type : Interventional  (Clinical Trial)
Enrollment : 20 participants
Allocation: Non-Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: Gadofosveset Imaging of Chronic Total Peripheral Artery Occlusion (CTO)
Study Start Date : April 5, 2007
Actual Primary Completion Date : November 25, 2008

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. Conspicuity of occluded arteries after contrast exposure.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Subjects with known cardiovascular disease will be eligible for participation in this protocol. The subject is eligible under the following conditions:

  • Subject's age is greater than 18 years of age.
  • Known occlusion of iliac, femoral, or brachiocephalic arteries.


Subjects with absolute contraindications to MRI scanning will be excluded. These contraindications include subjects with the following devices:

  • Implanted cardiac pacemaker or defibrillator.
  • Central nervous system aneurysm clips.
  • Implanted neural stimulator.
  • Cochlear implant.
  • Ocular foreign body (e.g. metal shavings).
  • Insulin pump.
  • Metal shrapnel or bullet.

When subjects can provide evidence that their implanted device is labeled compatible with MRI, exceptions to the above exclusions can be made and recorded in the note.

Furthermore, certain subject groups will be excluded because of the administration of MRI contrast agents. The weight limit is related to availability of investigational contrast agents. Because of recent concerns about Nephrogenic Systemic Fibrosis/Nephrogenic Fibrosing Dermopathy after gadobenate exposure in patients with end-stage renal disease, renal excretory function will be determined and patients with severe renal excretory dysfunction are excluded from this research protocol.

  • Pregnant women (subjects who are uncertain as to whether they are pregnant will be required to have a quantitative serum pregnancy test within 72 hours) or lactating women.
  • Subjects who have experienced an allergic reaction to gadolinium-based contrast agents.
  • Subjects with hemoglobinopathies.
  • Weight greater than 120 kg.
  • Subjects with renal disease (eGFR less than 30 ml/min/1.73m(2), or receiving renal replacement therapy).

The creatinine clearance will be estimated in all subjects as an estimated glomerular filtration rate (eGFR) using the abbreviated MDRD Formula.

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): NCT00459446

United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Heart, Lung, and Blood Institute (NHLBI)

Responsible Party: NHLBI Identifier: NCT00459446     History of Changes
Other Study ID Numbers: 070128
First Posted: April 12, 2007    Key Record Dates
Last Update Posted: July 2, 2017
Last Verified: November 25, 2008

Keywords provided by National Institutes of Health Clinical Center (CC):
Magnetic Resonance Imaging
Gadolinium Contrast
Chronic Total Arterial Occlusions
Cardiovascular Disease
Blocked Arteries
Peripheral Artery Disease
Intermittent Claudication
Chronic Total Arterial Occlusion

Additional relevant MeSH terms:
Peripheral Arterial Disease
Intermittent Claudication
Arterial Occlusive Diseases
Vascular Diseases
Cardiovascular Diseases
Peripheral Vascular Diseases
Signs and Symptoms