<Tr> <Td_colspan="2"> Blockage of a coronary artery </Td> </Tr> <Tr> <Th> Specialty </Th> <Td> Cardiology </Td> </Tr> <P> Acute coronary syndrome (ACS) is a syndrome (set of signs and symptoms) due to decreased blood flow in the coronary arteries such that part of the heart muscle is unable to function properly or dies . The most common symptom is chest pain, often radiating to the left shoulder or angle of the jaw, crushing, central and associated with nausea and sweating . Many people with acute coronary syndromes present with symptoms other than chest pain, particularly, women, older patients, and patients with diabetes mellitus . </P> <P> Acute coronary syndrome is commonly associated with three clinical manifestations: ST elevation myocardial infarction (STEMI, 30%), non ST elevation myocardial infarction (NSTEMI, 25%), or unstable angina (38%). These types are named according to the appearance of the electrocardiogram (ECG) as non-ST segment elevation myocardial infarction and ST segment elevation myocardial infarction . There can be some variation as to which forms of myocardial infarction (MI) are classified under acute coronary syndrome . </P>

What does acs stand for in medical terms