What is the definition or description of: coronary arteriosclerosis?

Increased thickness.: Coronary arteriosclerosis is the condition whereby the arteries are thickened, rigid, and tortuous as a result of deposition of cholesterol and /or calcium in the walls of the coronary arteries. This may lead to obstruction of the arteries from narrowing of the caliber or from the formation of clots.

Plaque: Deposition of large amounts of cholesterol materials under the inner lining of arteries supplying blood into heart muscle. Narrowed arteries may fail to meet the needs of the muscle. Rupture of plaque, resulting in a blood clot, can suddenly block an artery, resulting in infarction: a heart attack.