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Lycette Clarke 5/9/2007 What is Coronary Heart Disease (CHD)? CHD has two principal forms - angina and heart attacks (myocardial infarction). Both occur because the arteries carrying blood to the heart muscle become blocked or narrowed, usually by a deposit of fatty substances, a process known as arteriosclerosis. Angina is a severe pain in the chest brought on by exertion and relieved by rest. A heart attack is due to obstruction of a coronary artery either as a result of arteriosclerosis or a blood clot: part of the heart muscle is deprived of oxygen and dies. Basic diagram of the heart as a system Diagrams from: http://www.pbs.org/wgbh/nova/eheart/human.html The blockage of the arteries with the excess plaque formed by smoking, alcohol consumption, age (as you get older your risk factor increases) and diet, sex (males are more likely to get CAD), hereditary and the combined contraceptive pill and...

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