What are stable and unstable angina and myocardial infarction, and links to other infomration?

Angina. : Stable angina pain is under control with medication. Unstable angina : pain is unstable and increases in intensity or occurs at rest. Myocardial infarction : death of heart muscle.

Continuum: Angina can be quite severe and respond to rest, oxygen, nitroglycerin. And fully recover with no muscle death. The pain fibers are the same source. Some myocardial infarction can be asymptomatic all the way to the worst, ominous, pain ever! there is heart muscle death as the defining entity may need surgery or intervention.