Acute Coronary Syndrome (ACS) refers to a range of conditions associated with sudden, reduced blood flow to the heart. It is often caused by the rupture of an atherosclerotic plaque within a coronary artery, which can lead to the partial or complete blockage of the artery. ACS encompasses three main conditions: Unstable Angina (UA): This is chest pain or discomfort that occurs when the heart muscle doesn't get enough oxygen-rich blood. Unlike stable angina, it can occur suddenly and unpredictably, even at rest, and is considered a warning sign of an impending heart attack. Non-ST-Segment Elevation Myocardial Infarction (NSTEMI): This is a type of heart attack where blood flow to the heart muscle is restricted but not completely blocked. It causes damage to part of the heart, but the characteristic ST elevation seen in a standard ECG is not present. ST-Segment Elevation Myocardial Infarction (STEMI): This is the most severe form of heart attack, where there is a complete blockage o...