Final answer:
False. Unstable angina, NSTEMI, and STEMI fall under acute coronary syndromes (ACS), not chronic ischemic heart disease.
Step-by-step explanation:
False. Unstable angina, NSTEMI, and STEMI fall under acute coronary syndromes (ACS), not chronic ischemic heart disease. Chronic ischemic heart disease refers to a condition in which the blood flow to the heart muscle is chronically reduced due to plaque build-up in the coronary arteries. It typically presents with stable angina, which is chest pain that occurs predictably with exertion and is relieved by rest or medication. On the other hand, unstable angina, NSTEMI (non-ST elevation myocardial infarction), and STEMI (ST elevation myocardial infarction) are acute conditions that are considered medical emergencies and require immediate attention.