Medically reviewed by Nicholas R. Metrus, MD The posterior communicating artery (PCOM) is a part of a group of arteries in ...

Carotid artery disease, also called carotid artery stenosis, occurs when the carotid arteries, the main blood vessels that carry oxygenated blood to the brain, become narrowed. The narrowing of the ...

Without surgery, most patients with moyamoya disease will experience slowly narrowing brain arteries, decreasing brain blood flow ... patient and their unique version of moyamoya and vessel anatomy.