How is carotid artery stenosis classified?

How is carotid artery stenosis classified?

During the diagnosis process, your healthcare provider will look to see if you have the condition, how large it is, and where it’s located. Carotid artery stenosis is generally divided into three groupings: mild, moderate and severe. A mild blockage is one that’s less than 50%. This means that less than half of your artery is blocked. A moderate blockage is between 50% and 79%. The most severe classification involves having the majority of your artery blocked — from 80% to 99%.