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Factors Affecting the Development of Coronary Heart Disease Heart is a muscle, like any muscle it requires a constant supply of nutrients such as oxygen and glucose to function. These nutrients are carried to the heart via the coronary arteries. Coronary heart disease (CHD) is the narrowing and clogging up of these arteries. If the coronary arteries get partly blocked, it causes the part of the heart which it was supplying, to respire anaerobic ally due to lack of oxygen, lactic acid is produced, causing the muscle cells to get cramp. This cramp is associated with chest pains called angina which is relieved by rest. If the coronary arteries become fully blocked the part of the muscle which the arteries where supplying dies, this is called a heart attack or myocardial infarction. Both of these forms of heart disease occur due to narrowing or clogging up of the coronary...

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