Patients with myocardial infarction usually return to normal fibrin if treated aggressively. Myocardial infarction is a necrosis that occurs when there is an acute blockage of the coronary arteries and the heart muscle is deprived of a localized blood supply. Patients may experience chest pain, dyspnea, a feeling of suffocation, and shortness of breath. Once, the patient is diagnosed with myocardial infarction, after active treatment measures, usually the value of fibrin, can be gradually restored to normal levels. Patients with myocardial infarction can take oral pethidine hydrochloride, morphine and other pain-relieving and sedative drugs under the guidance of the doctor, or oral dilation of coronary artery drugs. As well as oral drugs to reduce myocardial oxygen consumption, such as metoprolol, bisoprolol and so on. Some patients also need to take surgical treatment, such as percutaneous coronary intervention and emergency coronary artery bypass grafting. Once diagnosed with myocardial infarction, patients should go to regular hospitals and actively cooperate with doctors to take relevant treatment measures to avoid delaying the condition. In daily life, ensure sufficient rest time and do not overwork.