Coronary insufficiency, also known as cardiac insufficiency or myocardial ischemia, refers to a condition where the heart muscle is not getting enough blood and oxygen. Synonyms for coronary insufficiency include angina pectoris, cardiac ischemia, ischemic heart disease, unstable angina, and silent ischemia. Angina pectoris is characterized by chest pain, while unstable angina is a more severe version and requires urgent medical attention. Ischemic heart disease is a broader term that refers to any condition that reduces blood flow to the heart. Silent ischemia is a condition where there are no symptoms, but the heart is still not receiving enough blood and oxygen. It is essential to identify and treat coronary insufficiency to prevent further complications such as heart attack or heart failure.