Carotid Artery Stenosis

Carotid artery disease occurs when the major arteries in your neck become narrowed or blocked. These arteries, called the carotid arteries, supply your brain with blood. Your carotid arteries extend from your aorta in your chest to the brain inside your skull.

You are more likely to develop carotid artery disease as you age. Only 1 percent of adults age 50 to 59 have significantly narrowed carotid arteries, but 10 percent of adults age 80 to 89 have this problem.

Your arteries are normally smooth and unobstructed on the inside, but as you age, cholesterol plaque can build up in the walls of your arteries. Plaque is made up of cholesterol, calcium, and fibrous tissue. As more plaque builds up, your arteries narrow and stiffen. This process is called atherosclerosis, or hardening of the arteries. Eventually, when enough plaque builds up to reduce blood flow through your carotid arteries, physicians call this carotid artery disease. Carotid artery disease is a serious health problem because it can cause a stroke or cerebrovascular incident.

Some plaque deposits are soft and are prone to cracking or forming roughened, irregular areas inside the artery. If this happens, your body will respond as if you were injured and flood the cracked and irregular area with cells called platelets. A large blood clot may then form in your carotid artery or one of its branches. If the clot blocks the artery enough to slow or stop blood and oxygen flow to your brain, it could cause a stroke. More commonly, a piece of the plaque itself, or a clot, breaks off from the plaque deposit and travels through your bloodstream. This particle can then lodge in a smaller artery in your brain and cause a stroke by blocking the artery.

Fortunately, you may be able to prevent or slow carotid artery disease:
Smoking cessation
Diabetes control
Blood pressure control
Cholesterol control
Regular exercising
Healthy diet
Maintaining a healthy weight