Acute myocardial infarction

Acute myocardial infarction (AMI) refers to the acute necrosis of part of the myocardium caused by persistent and severe myocardial ischemia. Clinically, it is often characterized by chest pain, acute circulatory dysfunction, and a series of characteristic ECG changes that reflect myocardial injury, ischemia and necrosis. Clinical manifestations often include persistent severe sternum pain, acute circulatory dysfunction, arrhythmia, heart failure, fever, white blood cell count, and elevated serum myocardial damage marker enzymes, as well as the progressive evolution of acute myocardial damage and necrosis on the ECG. According to the scope of infarction, myocardial infarction can be divided into two types: transmural myocardial infarction and subendocardial myocardial infarction. According to the development of the disease, myocardial infarction can be divided into acute myocardial infarction and old myocardial infarction.