Crescendo angina refers to unstable angina.
As a type of angina, the common symptoms of unstable angina include chest pain or discomfort. However, unstable angina is not predictable, and it can occur even when you are at rest.
It may be a sign of a heart attack. Therefore, if the pain lasts for several minutes, and does not eliminate after you take angina drugs, you should call emergency help.
Key word: crescendo angina