MRA of the carotids

what does "mild, 20%, stenosis in the origin of the left internal carotid artery", mean? A mild, 20%, narrowing is seen in the proximal left internal carotid artery. 1. Dominant left vertebral artery with patent right vertabral artery.

[Dr Santos]

Hi,
How are you? The carotid arteries are the major source of oxygen-rich blood flow to the brain. Carotid artery stenosis (CAS) occurs when carotid arteries arteries become more narrow. Mild carotid artery stenosis occurs in most people as they age. However, the greater the blockage, the more chance that those affected will suffer a stroke or a transient ischemic attack. Discuss the results with your attending physician for proper management. Your medical history and symptoms are important considerations as well. Take care and do keep us posted.