Definition of Atherosclerosis:- The build-up of fats, cholesterol and other substance in and on the Artery walls.It is defined as accumulation of fat in wall of blood vessels (artery or veins),or hardening of blood vessels due to increase level of cholesterol in blood or serum. … Continue readingAtherosclerosis, Definition of Atherosclerosis, Clinical Manifestation, Medical Management, and Surgical Management, (by GS India Nursing).