Arteriosclerosis is a common and important type among a group of vascular diseases known as arteriosclerosis. The common characteristics of various arterioscleroses include thickening and hardening of arterial walls, loss of elasticity, and narrowing of the lumen. Atherosclerosis is a type of arteriosclerosis characterized by lesions starting from the arterial intima, subsequently involving the accumulation of lipids and complex carbohydrates, bleeding, thrombosis, proliferation of fibrous tissues, and deposition of calcium, along with gradual degeneration and calcification of the arterial media. Since the lipids accumulated in the arterial intima appear yellowish and mushy, it is termed atherosclerosis.