What is carotid artery stenosis?

What is carotid artery stenosis?

Carotid artery stenosis is a condition that happens when your carotid artery, the large artery on either side of your neck, becomes blocked. The blockage is made up of a substance called plaque (fatty cholesterol deposits). When plaque blocks the normal flow of blood through your carotid artery, you’re at a higher risk of stroke. Plaque build-up is called atherosclerosis.

You have two carotid arteries — one on each side of your neck. These are large arteries that bring blood to your brain, face and head. When they’re healthy, these arteries are smooth and open, like a clean pipe that allows the free flow of fluid without anything in the way. Your body’s circulatory system is a network of tubes that carry blood (containing nutrients and oxygen) to all the parts of your body.

You can develop carotid artery stenosis in either of the two arteries in your neck or in both. This condition can worsen over time without medical care, leading to stroke with severe complications that can include death.