When the carotid arteries become blocked with cholesterol plaques (atherosclerotic plaques), blood flow to the brain is compromised. Also, small pieces of plaque can break off and block small arteries in the brain. This blockage of the blood vessels can cause transient-ischemic attacks and strokes.
Update Date 6/2/2014
Updated by: Norman S. Kato, MD, Surgeon with the Cardiac Care Medical Group, Encino, CA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.