Predictive Value for Stroke

April 18, 2011 updated by: Dutch Heart Foundation

Predictive Value of Magnetic Resonance Imaging (MRI), 18-Fluorodeoxyglucose Positron Emission Tomography (FDG-PET), and Microemboli Detection for Stroke

Patients with a moderate to severe carotid atherosclerotic plaque are at risk for stroke and this risk increases with increasing degree of stenosis. It has been shown that carotid endarterectomy in symptomatic patients with a carotid artery stenosis of 70-99% is highly beneficial. However, the beneficial effect of surgery in patients with symptomatic 30-69% stenosis is not clear yet.A clear beneficial effect of surgery in the 30-69% stenosis group might be found in a sub-group of patients whom are at greater risk for stroke. Definition of this sub-group might be achieved by plaque characterization, since rupture of a vulnerable plaque is the main cause of stroke due to carotid artery stenosis.This study will include patients with a 30-69% carotid artery stenosis, and assess plaque composition by MRI, the degree of plaque inflammation by FDG-PET, and the amount of microembolization by transcranial Doppler ultrasound. The main purpose of this study is to assess whether one or a combination of each of these imaging methods can predict the occurrence of a (recurrent) ischemic stroke.

Study Overview

Status

Unknown

Conditions

Study Type

Observational

Enrollment (Anticipated)

200

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • Netherlands
    • Limburg
      • Maastricht, Limburg, Netherlands, 6202 AZ
        • Recruiting
        • University Hospital Maastricht, Department of Radiology
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Patients with a history of transient ischemic attack or minor stroke within three months of enrollment and an ipsilateral 30-69% carotid stenosis.

Description

Inclusion Criteria:

  • Patients with neurological symptoms due to ischemia in the carotid artery territory and with a carotid stenosis between 30% and 69% as detected by ultrasound examination

Exclusion Criteria:

  • Patients with a probable cardiac source of embolism (rhythm disorders, mitral valve stenosis, prolapse or calcification, mechanical cardiac valves, recent myocardial infarction, left ventricular thrombus, atrial myxoma, endocarditis, dilated cardiomyopathy, patent foramen ovale) or a clotting disorder.
  • Patients with evident other cause of neurological symptoms than carotid stenosis due to atherosclerotic disease (like demyelinating diseases, epilepsy, congenital brain disorders, aneurysms, fibromuscular dysplasia, etc.).
  • Patients already scheduled for carotid endarterectomy or stenting
  • Severe co-morbidity, dementia, or pregnancy.
  • Standard contra-indications for MRI (ferromagnetic implants like pacemakers or other electronic implants, metallic eye fragments, vascular clips, claustrophobia, documented allergy to contrast media, renal insufficiency, etc).
  • Patients who were referred from another hospital to one of the three participating hospitals (to avoid referral bias).
  • Patients who had a TIA or minor stroke more than 3 weeks before inclusion
  • Patients who had a prior TIA or stroke

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Dutch Heart Foundation

Collaborators

Academisch Ziekenhuis Maastricht

Investigators

  • Principal Investigator: Marianne E Kooi, PhD, University Hospital Maastricht, Department of Radiology

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

August 1, 2007

Study Completion (Anticipated)

September 1, 2011

Study Registration Dates

First Submitted

March 22, 2007

First Submitted That Met QC Criteria

March 22, 2007

First Posted (Estimate)

March 23, 2007

Study Record Updates

Last Update Posted (Estimate)

April 19, 2011

Last Update Submitted That Met QC Criteria

April 18, 2011

Last Verified

April 1, 2011

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2006 B0

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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