Study of Carotid Occlusion and Neurocognition
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).
|Study Design:||Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Single Blind (Outcomes Assessor)
Primary Purpose: Treatment
|Official Title:||Randomized Evaluation of Carotid Occlusion and Neurocognition (RECON)|
- Cognitive Functioning on Neuropsychological assessment measures [ Time Frame: 2 years ] [ Designated as safety issue: No ]
- Quality of Life and Disability [ Time Frame: 2 years ] [ Designated as safety issue: No ]
|Study Start Date:||November 2004|
|Study Completion Date:||June 2012|
|Primary Completion Date:||June 2012 (Final data collection date for primary outcome measure)|
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
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.
|United States, New York|
|Columbia University Medical Center|
|New York, New York, United States, 10032|
|Principal Investigator:||Randolph S Marshall, MD||Columbia University|
|Principal Investigator:||Joanne R Festa, PhD||Columbia University|