What is the difference between stable and unstable angina?

The distinction between stable and unstable angina primarily revolves around the predictability of the symptoms and their relief. Stable angina is typically characterized by chest pain that arises during physical exertion or emotional stress and is relieved by rest or nitroglycerin. This pattern is consistent and predictable, meaning that individuals can usually identify triggers and manage the symptoms effectively.

Unstable angina, on the other hand, is more unpredictable and can occur at rest or with minimal exertion. The pain may not be alleviated with rest or typical remedies like nitroglycerin, indicating a more serious condition that requires immediate medical attention. This difference is crucial because unstable angina can be a sign of a heart attack or severe coronary artery disease.

By understanding that stable angina can be managed by rest and is predictable, while unstable angina represents a significant risk and is not relieved by rest, one grasps the essential clinical differences that inform appropriate treatment decisions and patient care.