The time of death after a myocardial infarction episode varies from person to person and is related to factors such as the patient’s age, site of onset, and whether or not the patient was treated in a timely manner. Myocardial infarction refers to a sudden blockage of a blood vessel in the heart, resulting in myocardial ischemia, hypoxia, and necrosis, and usually results in a high mortality rate within a few hours to a week after the onset of the attack. If a patient has a mild infarction that has not affected cardiac function, the prognosis is good and will not lead to death; patients with infarct foci located in thicker blood vessels rarely have a chance of resuscitation or even sudden death; younger patients are more severe when the same blood vessels develop; patients with heart attacks usually do not die in the short term if they are treated in a timely manner. If they are not seen in time and have serious complications, sudden death may occur at any time. Patients with myocardial infarction should be actively treated with coronary intervention, coronary artery bypass grafting or drug conservative treatment, and dual antiplatelet therapy and antihypertensive therapy should be used within 1 year before the onset.