Which artery is most commonly involved in cases of carotid stenosis?

Which artery is most commonly involved in cases of carotid stenosis?

• A. External carotid artery
• B. Internal carotid artery
• C. Subclavian artery
• D. Vertebral artery

Answer: (B)

The internal carotid artery is the most commonly involved artery in cases of carotid stenosis. This condition refers to the narrowing of the artery due to the buildup of atherosclerotic plaques, which typically occurs in the internal carotid artery more than in other arterial branches. Since the internal carotid artery is responsible for supplying blood to the brain, any stenosis can significantly affect cerebral blood flow and increase the risk of stroke. Atherosclerosis often preferentially affects this artery because it is subject to high shear stress due to its anatomy and the way blood flows through it. The bifurcation of the common carotid artery into the internal and external carotid arteries serves as an important site where turbulent blood flow can promote plaque formation, making this region especially vulnerable to stenosis. Other arteries listed, such as the external carotid artery, subclavian artery, and vertebral artery, are not as frequently involved in carotid stenosis. The external carotid artery primarily supplies the face and neck and is not typically the site of significant stenosis impacting cerebral circulation. The subclavian artery supplies blood to the upper extremities and does not have a direct role in carotid artery disease. Similarly, the vertebral artery, while it plays a

The internal carotid artery is the most commonly involved artery in cases of carotid stenosis. This condition refers to the narrowing of the artery due to the buildup of atherosclerotic plaques, which typically occurs in the internal carotid artery more than in other arterial branches. Since the internal carotid artery is responsible for supplying blood to the brain, any stenosis can significantly affect cerebral blood flow and increase the risk of stroke.

Atherosclerosis often preferentially affects this artery because it is subject to high shear stress due to its anatomy and the way blood flows through it. The bifurcation of the common carotid artery into the internal and external carotid arteries serves as an important site where turbulent blood flow can promote plaque formation, making this region especially vulnerable to stenosis.

Other arteries listed, such as the external carotid artery, subclavian artery, and vertebral artery, are not as frequently involved in carotid stenosis. The external carotid artery primarily supplies the face and neck and is not typically the site of significant stenosis impacting cerebral circulation. The subclavian artery supplies blood to the upper extremities and does not have a direct role in carotid artery disease. Similarly, the vertebral artery, while it plays a