Which of the following is NOT categorized as a type of angina pectoris?

The correct answer is chronic because chronic angina is not a recognized category of angina pectoris. Angina pectoris is typically classified into three main types: stable angina, unstable angina, and variant angina (also known as Prinzmetal’s angina).

Stable angina is characterized by predictable chest pain that occurs with stress or exertion and typically resolves with rest or medication. Unstable angina involves unexpected chest pain that can occur at rest and may signal impending heart issues. Variant angina is associated with coronary artery spasm and can occur at rest, often in cycles, and is marked by transient ischemic episodes.

Chronic refers to a duration of a condition rather than a specific type of angina, which is why it does not fit into the classifications of angina pectoris. Thus, it is not accurate to term angina as chronic in the same way as the other three defined categories.