Which type of angina typically occurs after exertion or stress?

Stable angina is characterized by predictable occurrences typically triggered by physical exertion or emotional stress. In individuals with stable angina, the heart requires more oxygen during these activities, which can lead to chest pain or discomfort as a result of restricted blood flow due to coronary artery disease. The symptoms usually resolve with rest or the use of nitroglycerin, highlighting the relationship between exertion or stress and the onset of angina in these patients.

Prinzmetal's angina, on the other hand, is often caused by coronary artery spasms and can occur at rest or during sleep, independent of exertion. Unstable angina is a more serious condition that may occur at rest and is not predictable, indicating a more immediate risk for heart issues. Noncardiac angina typically arises from conditions unrelated to heart problems, such as gastrointestinal reflux, thus further differentiating it from stable angina that is clearly associated with physical stress.