Older people are older and slower to react, and they are often accompanied by other diseases, such as patients with diabetes, who are not sensitive to pain, and chest pain may not be obvious during heart attack, which may not cause the elderly to pay enough attention to the disease and delay the disease and endanger their lives, so myocardial infarction in the elderly is more dangerous than in young people. Myocardial infarction mostly occurs on the basis of atherosclerotic stenosis of coronary arteries. Due to some triggers, the atheromatous plaques of coronary arteries rupture and platelets in the blood gather on the surface of the ruptured plaques to form thrombi, which suddenly block the lumen of coronary arteries and cause occlusion of coronary arteries and interruption of blood flow, resulting in local necrosis of part of the myocardium due to severe and persistent ischemia. Acute myocardial infarction is serious and has a high mortality rate. Thrombolysis or emergency intervention should be given as soon as possible after the onset of the disease, and the sooner the better. For elderly people, if shock occurs suddenly, serious arrhythmia, heart failure, epigastric distension or vomiting, etc., the cause of which is not known, or if the original hypertension is suddenly reduced and the cause is nowhere to be found, or if shock occurs after surgery, but bleeding and other causes are excluded, the possibility of myocardial infarction should be considered.