Study of Carotid Occlusion and Neurocognition

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: NCT00390481
Recruitment Status : Completed
First Posted : October 19, 2006
Last Update Posted : July 30, 2013
National Institute of Neurological Disorders and Stroke (NINDS)
Information provided by (Responsible Party):
Randolph S. Marshall, Columbia University

Brief Summary:
To determine the relationship between cognitive functioning and blood flow in the brain among patients randomized to either extracranial-intracranial (EC-IC) bypass or medical therapy alone in the Carotid Occlusion Surgery Study (COSS).

Condition or disease Intervention/treatment Phase
Carotid Artery Diseases Procedure: EC-IC Bypass in the COSS study Not Applicable

Detailed Description:
The Carotid Occlusion Surgery Study (COSS) evaluates whether a surgical operation, EC-IC bypass surgery, can reduce the chance of a stroke in someone who has complete blockage in one main artery in the neck that supplies blood to the brain (the carotid artery). The operation bypasses the blockage so more blood can flow to the brain. Only people with decreased blood flow to the brain, as demonstrated on a PET (positron emission tomographic) scan, are randomized into the COSS study. Among patients randomized into the COSS study, RECON will evaluate whether restoring the blood flow to the brain (with EC-IC bypass surgery) will also improve mental functioning. Participants in both the surgical and medical groups of the COSS study will participate in the RECON study. By comparing the mental functioning of the participants in both treatment groups over the course of 2 years, the investigators hope to determine whether the EC-IC bypass operation also helps improve or maintain mental functioning.

Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 294 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Randomized Evaluation of Carotid Occlusion and Neurocognition (RECON)
Study Start Date : November 2004
Actual Primary Completion Date : June 2012
Actual Study Completion Date : June 2012

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
EC-IC Bypass
Procedure: EC-IC Bypass in the COSS study
EC-IC Bypass surgery involves taking an artery from the scalp outside the skull, making a small hole in the skull, and then connecting the scalp artery to a brain artery inside the skull. In this way, the blockage of the carotid artery in the neck is bypassed and more blood can flow to the brain.

No Intervention: Control
Best Medical Therapy

Primary Outcome Measures :
  1. Cognitive Functioning on Neuropsychological assessment measures [ Time Frame: 2 years ]

Secondary Outcome Measures :
  1. Quality of Life and Disability [ Time Frame: 2 years ]

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 85 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Enrollment into Carotid Occlusion Surgery Study

Exclusion Criteria:

  • Prior diagnosis of dementia

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): NCT00390481

United States, New York
Columbia University Medical Center
New York, New York, United States, 10032
Sponsors and Collaborators
Columbia University
National Institute of Neurological Disorders and Stroke (NINDS)
Principal Investigator: Randolph S Marshall, MD Columbia University
Principal Investigator: Joanne R Festa, PhD Columbia University

Additional Information:
Responsible Party: Randolph S. Marshall, Professor at Affil Hosp/Inst, Columbia University Identifier: NCT00390481     History of Changes
Other Study ID Numbers: AAAA8456
5R01NS048212 ( U.S. NIH Grant/Contract )
First Posted: October 19, 2006    Key Record Dates
Last Update Posted: July 30, 2013
Last Verified: July 2013

Keywords provided by Randolph S. Marshall, Columbia University:
Carotid Occlusion

Additional relevant MeSH terms:
Carotid Artery Diseases
Cerebrovascular Disorders
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Vascular Diseases
Cardiovascular Diseases