A. Angina occurring at rest with a fixed duration
B. Recent onset angina occurring with a fixed amount of exertion relieved with rest
C. Chronic angina occurring with a fixed amount of exertion relieved with rest
D. Angina occurring with a fixed amount of exertion that has recently required less exertion to bring about symptoms
The other three choices describe unstable angina. The difference between stable angina pectoris and unstable angina pectoris is below.
Stable angina pectoris: Symptoms of angina with a consistent amount of physical exertion that is relieved with rest that has been present for a long duration.
Unstable angina pectoris: Three different presentations of unstable angina exist.
1. Exertional angina of new onset. Even if relieved with rest and requiring a consistent amount of exertion to procedure symptoms, when angina first occurs it is considered unstable.
2. Exertional angina that was previously stable and now occurs with less physical exertion.
3. Anginal symptoms at rest without physical exertion.