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Magnetic Resonance Imaging to Investigate Silent Strokes During Neck and Skull Angioplasty

This study has been completed.
Sponsor:
Information provided by:
National Institutes of Health Clinical Center (CC)
ClinicalTrials.gov Identifier:
NCT00015717
First received: May 2, 2001
Last updated: March 3, 2008
Last verified: March 2004
  Purpose

This study will use magnetic resonance imaging (MRI) to determine if silent strokes occur during angioplasty of the blood vessels in the neck or skull. Neck and skull angioplasties are relatively new procedures whose possible complications are still under investigation.

Patients 18 years of age or older who are admitted to Suburban Hospital in Bethesda, Maryland, for angioplasty of one or more of the blood vessels in the neck or skull may participate in this study. Participants must be able to undergo a brain MRI. Within 24 hours before their angioplasty, patients will provide a medical history and have a physical examination and brain MRI. The physical examination and MRI will be repeated within 24 hours after the angioplasty.

MRI is a diagnostic test that uses a magnetic field and radio waves to show structural and chemical changes in tissues. This technique is more sensitive than X-rays in detecting some changes that occur in diseases of the brain. For the procedure, the patient lies on a table that slides into a metal cylinder (the scanner). The confined space may produce anxiety in some patients, and patients can talk to the technician at all times during the procedure. Earplugs are provided to muffle loud knocking and pulsing noises that occur while the scanner is taking pictures. During the study, the contrast material gadolinium may be injected into an arm vein. Gadolinium "brightens" the pictures, producing better images of brain blood flow.

Patients will be contacted by telephone 30 days after the procedure to follow how they are doing and learn whether any complications resulted from the angioplasty.


Condition
Brain Ischemia

Study Type: Observational
Official Title: Silent Cerebral Ischemia After Cervico-Cranial Angioplasty Detected by Diffusion-Weighted MRI

Resource links provided by NLM:


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

Estimated Enrollment: 24
Study Start Date: April 2001
Estimated Study Completion Date: March 2004
Detailed Description:

Recently cervico-cranial angioplasty and stenting (CCAS) has been introduced as alternative treatment for occlusive disease of the extracranial and the intracranial vessels. Temporary or permanent clinically detectable neurological deficits occur in up to 13% of all patients undergoing CASS and are usually related to distal embolization or hemodynamic insufficiency. Silent cerebral micro-emboli are known to occur in patients undergoing carotid endarterectomy and angioplasty but are believed to be of little clinical significance. Distal embolization may be a technical concern when performing CCAS and could cause silent cerebral ischemia. High resolution diffusion-weighted MRI may detect silent hyperacute ischemic lesions in patients undergoing CCAS and examination by a stroke neurologist may detect clinical deficits otherwise unrecognized.

  Eligibility

Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

INCLUSION CRITERIA:

Men and women age 18 years or older admitted for angioplasty with or without stenting of any intra or extra-cranial vessel.

EXCLUSION CRITERIA:

Any MRI contraindication (insulin pump, aneurysm clips, implanted neural stimulator, cardiac pacemaker or defibrillator, cochlear implant, metal shrapnel or bullet)

Patients with hyperperfusion syndrome following the angioplasty.

Patients with cardiovascular or respiratory instability.

Patients with severe peri-procedural stroke at risk for herniation.

Confused or encephalopathic patients who are unable to cooperate.

Pregnant women.

Lactating women

  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00015717

Locations
United States, Maryland
National Institute of Neurological Disorders and Stroke (NINDS)
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
  More Information

Publications:
ClinicalTrials.gov Identifier: NCT00015717     History of Changes
Other Study ID Numbers: 010146, 01-N-0146
Study First Received: May 2, 2001
Last Updated: March 3, 2008
Health Authority: United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):
Imaging
Complications
Stenosis
Treatment
Strokes
Cerebral Ischemia
Cranial Cervical Angioplasty

Additional relevant MeSH terms:
Brain Ischemia
Ischemia
Brain Diseases
Cardiovascular Diseases
Central Nervous System Diseases
Cerebrovascular Disorders
Nervous System Diseases
Pathologic Processes
Vascular Diseases

ClinicalTrials.gov processed this record on November 24, 2014