Neuroimaging Correlates of Memory Decline Following Carotid Interventions

August 24, 2022 updated by: Stanford University
Carotid revascularization can significantly reduce the risk of stroke in patients with severe carotid stenosis; however, it has been associated with cognitive decline in 25% of the older adults who undergo the procedure. Characterizing risk factors for cognitive decline following carotid interventions and individualizing treatment strategy based on those risks can minimize procedure-associated cognitive dysfunction. Neuroimaging techniques that characterize white matter integrity and regional hypoperfusion have the potential to provide sensitive brain structure indicators that may be associated with memory decline following revascularization procedures. In this protocol, we hope to determine how cerebral blood flow and baseline white matter abnormality in the vulnerable region modify the frequency and cognitive effect of microembolization following carotid revascularization procedures.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Actual)

207

Contacts and Locations

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

Study Locations

  • United States
    • California
      • Palo Alto, California, United States, 94304
        • Palo Alto Veterans Affairs

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

40 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Patients undergoing carotid intervention

Description

Inclusion Criteria:

  • Patient is male or female >40 yrs of age.
  • Patient has occlusive extracranial carotid stenosis (≥70%)
  • Patient is scheduled to undergo a carotid revascularization procedure
  • Patient agrees to voluntarily participate in the study and signs an informed consent.
  • Patient agrees to be available for follow-up and is able to participate in all study testing procedures.
  • Patient has sufficient visual and auditory acuity for cognitive testing.

Exclusion Criteria:

  • Patient is unable to safely and comfortably undergo MR imaging procedures (e.g., claustrophobia, implanted medical devices that are MRI incompatible such as pacemaker, defibrillator, neural stimulator etc)
  • Patient has an untreated or unsuccessfully controlled psychiatric disease (schizophrenia, bipolar disorder).
  • Patient has prominent suicidal or homicidal ideation.
  • Patient has acute illness or unstable chronic illness (e.g. uncontrolled hypertension, hepatic encephalopathy, portal hypertension, ascites, and esophageal varices, pancreatitis).
  • Patient with a history of neurological (e.g., multiple sclerosis, seizure disorder, Parkinson's disease) or systemic illness affecting central nervous system function.
  • Patient has prior closed head injury with ≥24 hours of amnesia.

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

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Neuroimaging Correlates
Other: Magnetic resonance imaging
arterial spin labeling, diffusion tensor imaging, and diffusion weighted imaging sequences will be used
Behavioral: Neuropsychological testing

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Brain MRI scans
Time Frame: 6 months following the procedure
White matter abnormality and perfusion in correlation with microembolization and cognitive change
6 months following the procedure

Collaborators and Investigators

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

Sponsor

Stanford University

Investigators

  • Principal Investigator: Wei Zhou, MD, Palo Alto Veterans Affairs/Stanford University

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 (Actual)

November 1, 2012

Primary Completion (Actual)

April 1, 2018

Study Completion (Actual)

April 1, 2018

Study Registration Dates

First Submitted

October 29, 2012

First Submitted That Met QC Criteria

December 4, 2013

First Posted (Estimate)

December 9, 2013

Study Record Updates

Last Update Posted (Actual)

August 29, 2022

Last Update Submitted That Met QC Criteria

August 24, 2022

Last Verified

August 1, 2022

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • R21NS081416-01 (U.S. NIH Grant/Contract)

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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