Coronary heart disease:

Coronary arteries are arteries which supply blood to the heart to provide nutrients and oxygen. Coronary heart disease occurs when these arteries are narrowed or even blocked. Heart disease is the second killer disease (second only to cancer) in Hong Kong. Among the different types of heart disease, coronary heart disease is the commonest and it is increasing, especially among younger people.

Angina Pectoris :

Angina Pectoris occurs when there is an inadequate perfusion to match with demand. It is caused by narrowing of the coronary arteries due to plaques. It usually occurs under physical exertion e.g. while doing exercise, brisk walking or under emotional stress.

Classification of Angina Pectoris (CCS*) :

　Class I 　　Ordinary physical exercise does not cause angina pectoris

　Class II 　　Slight limitation of ordinary activities

　Class III 　Marked limitation of ordinary activities

　Class IV 　Inability to carry on any physical activity without discomfort

　* Canadian Cardiovascular Society

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