Angina: Angina pectoris is a term to describe chest pain that occurs when the heart is not getting enough blood. There are two types of angina, stable (the most common) and unstable. Stable angina generally lasts less than five minutes and is relieved by nitroglycerin tablets. Angina may be caused by heart disease, coronary artery spasm, or other causes. Risk factors include high blood pressure, high cholesterol, diabetes, smoking, sedentary lifestyle, family history, aging, and stimulant use. Treatment depends upon the source of angina.