Managing unstable angina and non-ST elevation MI.

Acute coronary syndrome (ACS), encompassing unstable angina (UA), non-ST elevation myocardial infarction (NSTEMI) and ST elevation myocardial infarction (STEMI), is often the result of an acute thrombotic occlusion of the coronary vessels, associated with atheromatous plaque rupture or erosion. ACS is associated with a severely impaired prognosis and requires prompt and efficient specialist treatment. The clinical presentation may be identical across all three components of ACS.