Angina is the term for chest pain or chest discomfort. Angina occurs when the heart muscle is not getting enough blood and therefore enough oxygen to work properly. It is usually caused by hardening of the arteries.
Angina can be classified as either stable or unstable:
Angina is a warning sign that the heart is under stress. It is extremely hard to tell the difference between angina and a heart attack, so you should act quickly if you or someone you know has chest pain or tightness:
Prevention
You can prevent angina the same way you can prevent a heart attack. See "How can I reduce my risk of developing heart disease and having a heart attack?" to learn more.
Additional resources
Prepared by the Heart and Stroke Foundation of Canada and modified by Alberta Health Services. This FAQ appeared originally on the Canadian Health Network Web site.