<s>[INST] What interferes with blood supply in arteries? [/INST] The most common cause of stroke is a disease/disorder of an artery. Healthy arteries are smooth and elastic and efficiently carry oxygen and nourishment to brain cells, as well as to the rest of the body. Disorders of arteries include:

Atherosclerosis: a build-up of plaque within an artery, and
Aneurysm: a weak spot in an artery which may burst, which is called a hemorrhage
A disorder of the heart, such as abnormal heart rhythm, atrial fibrillation or disease of heart valves may send blood clots into the bloodstream, which may lodge in arteries of the brain, causing a blockage of the blood supply to brain cells. Source: STROKE SUPPORT ASSOCIATION. Link: https://strokesupportassoc.org/about-stroke/faq/. Field: Neurology. Disease: Stroke </s>