What does acute coronary syndrome refer to?

Acute coronary syndrome (ACS) refers to a range of conditions associated with sudden, reduced blood flow to the heart. This condition typically encompasses situations like unstable angina and myocardial infarction (heart attack), which occur when the heart muscle experiences ischemia—or a deficit in oxygen supply. The correct answer highlights that ACS is fundamentally about the heart's inadequate oxygenation, often due to blockage in the coronary arteries. This can result from plaque rupture or thrombosis, leading to symptoms such as chest pain, shortness of breath, and other critical manifestations that require immediate medical attention. Understanding ACS is crucial for early diagnosis and treatment to prevent further heart damage.