Abbreviation: ACS
A group of conditions caused by acute myocardial ischemia, including unstable angina, non-ST-segment elevation myocardial infarction (NSTEMI), and ST-segment elevation myocardial infarction (STEMI). Caused by erosion or rupture of coronary artery plaques, resulting in partial or complete occlusion of a coronary artery and reduced blood flow to the myocardium.