There are four carotid arteries: the right and left internal carotid arteries and the right and left external carotid ... a stroke may occur. Atherosclerosis is the most common cause of carotid artery ...

Carotid artery dissection is the most common cause of stroke in people younger than 40 and causes 2.5% of strokes overall. The symptoms of carotid artery dissection vary significantly between ...

The most common cause of carotid artery narrowing is a buildup of plaque in the arteries ... Figure 3a: Neck angiogram lateral (side) view of the left carotid artery. There is severe stenosis or ...

The left and right PCAs form the longest sections of the circle of Willis. The internal carotid ... being the most common.