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Carotid Atherosclerotic Plaque Study

This study has been completed.
Information provided by (Responsible Party):
University of Wisconsin, Madison Identifier:
First received: September 13, 2005
Last updated: March 6, 2013
Last verified: March 2013
First, to establish a comparison of the pathophysiology of carotid atherosclerosis and the genetic and environmental variables that cause those plaques to become symptomatic. Second, to differentiate between vulnerable plaque and other types of plaque using ultrasound elastography, MRI data, trans-cranial doppler along with RF (radio frequency) analysis of back-scattered ultrasonic echoes.


Study Type: Observational
Study Design: Observational Model: Case-Only
Time Perspective: Prospective
Official Title: Carotid Atherosclerotic Plaque Study

Resource links provided by NLM:

Further study details as provided by University of Wisconsin, Madison:

Primary Outcome Measures:
  • Lipid protein analysis and cognitive status comparison [ Time Frame: 2008-2011 ]

    Comparison studies will be done using the lipid protein analysis and imaging studies. The primary comparison will be between those that are symptomatic and those that are asymptomatic. Secondary comparisons will be done using the lipid protein analysis and patient history.

    Comparison of cognitive status between groups will be made using analysis of covariance in which the difference in follow-up score between groups (symptomatic/asymptomatic) is adjusted for baseline score. The baseline adjusted standard error is 6.4, which with 36 subjects per group will yield 90% power to detect a difference between groups of approximately 4.9 points at a significant level of 5%. We need 36 subjects per group to achieve the power stated. We have built in another 15% for projected dropout to insure we meet the final target.

Enrollment: 162
Study Start Date: November 2001
Study Completion Date: February 2011
Primary Completion Date: November 2010 (Final data collection date for primary outcome measure)
Detailed Description:
This is a multi-investigator study based on the pathophysiology of carotid atherosclerosis and the variables that cause certain plaques to become symptomatic.Patients enrolled in this study will be those patients undergoing a carotid endarterectomy. This will include both symptomatic and asymptomatic patients, and there are a variety of atherosclerotic risk factors representing this patient population.Patients may or may not have had strokes or transient ischemic attacks (TIAs).Pre-operatively patients will be reviewed for their medical history and atherosclerotic risk factors. Plaque removed during routine carotid endarterectomy will be examined for study purposes.

Ages Eligible for Study:   18 Years to 80 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Patients undergoing carotid endarectomy

Inclusion Criteria:

  • Male and Female patients aged 18-80 presenting for carotid endarterectomy

Exclusion Criteria:

  • Patients not felt suitable for carotid endarterectomy and those with impaired decision-making capacity
  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 identifier: NCT00214006

United States, Wisconsin
University of Wisconsin
Madison, Wisconsin, United States, 53792
Sponsors and Collaborators
University of Wisconsin, Madison
Principal Investigator: Robert J. Dempsey, MD University of Wisconsin, Madison
  More Information

Responsible Party: University of Wisconsin, Madison Identifier: NCT00214006     History of Changes
Other Study ID Numbers: 2008-0053
Study First Received: September 13, 2005
Last Updated: March 6, 2013

Additional relevant MeSH terms:
Plaque, Atherosclerotic
Arterial Occlusive Diseases
Vascular Diseases
Cardiovascular Diseases
Pathological Conditions, Anatomical processed this record on September 19, 2017