Final answer:
Prinzmetal's angina typically occurs at rest and can also be triggered by emotional stress. Unlike stable angina, it is caused by a spasm in the coronary arteries and requires medical attention for diagnosis and treatment.
Step-by-step explanation:
Prinzmetal's angina, also known as variant angina, is a type of angina that typically occurs at rest, rather than during physical exertion. Unlike stable angina, which is precipitated by exertion and relieved with rest or nitroglycerin, Prinzmetal's angina is caused by a spasm in the coronary arteries that reduces blood flow to the heart muscle. Therefore, when else may Prinzmetal's angina be seen? The correct answer is at rest (b). It is often cyclical and occurs around the same time every day, mostly at night or early in the morning. Prinzmetal's angina can also be triggered by emotional stress (d), but is less commonly associated with exercise or after meals. It is important for individuals experiencing any form of angina to seek medical attention for proper diagnosis and treatment, as angina is a symptom of underlying heart disease.