Abstract: Coronary heart disease (CHD) is also known as Atherosclerosis. Is the primary cause of heart disease & stroke. In western countries 50% causes of death is due to heart disease. There are some environmental factors and genetic factors causes Atherosclerosis. In 1949 Atherosclerosis was added to “International classification of Diseases”. In United States about 1 in 4 death is due to heart disease. Atherosclerotic is a chronic inflammatory process which results in the formation of plaque in the artery which restricts blood flow and lead to thrombosis.