We will continue to say:Hardness of the arteries is atherosclerosis, where the proportion of low-density lipoprotein in the blood, or more than 160 mg / dL, and thus lead to accumulation in the arteries, causing them to narrow gradually, which prevents the passage of blood easily, affecting the nutrition of the heart muscle, Serious health problems that threaten human life, and we will inform you in this article on the disease of atherosclerosis, its causes, symptoms, and methods of treatment.