Heart attack generally refers to acute myocardial infarction, and patients with acute myocardial infarction who have myocardial tonicity, ef value 40 can generally recover to 60%. However, it is difficult for patients with large myocardial infarction to return to normal, but the disease recovery can be promoted through medication and surgical treatment. Heart ef value is the left ventricular ejection fraction, the normal value is 50%~70%, if the ef value of acute myocardial infarction is 40%, if the area of myocardial infarction is not large, there is myocardial tonicity, after active treatment, it can be restored to 60%. But for patients with large myocardial infarction, it is difficult to return to normal. However, patients can adopt relevant therapeutic measures so as to improve the prognosis. Patients can take oral nitroglycerin, isosorbide dinitrate, etc., or oral drugs to reduce myocardial oxygen consumption, such as metoprolol, bisoprolol, etc., under the guidance of doctors. Some patients can also take percutaneous coronary intervention, emergency coronary artery bypass grafting and so on. Once diagnosed with acute myocardial infarction, patients need to actively cooperate with doctors to take relevant treatment measures.