The full term for lower wall heart attack is inferior wall myocardial infarction. The life expectancy of a patient with an inferior wall myocardial infarction is related to the extent of the myocardial infarction, the patient’s own condition, mental status, and the effectiveness of treatment. In less severe cases, life expectancy may be unaffected, while in severe cases, sudden death may occur. Patients with lower wall myocardial infarction will be able to restore blood flow to the occluded blood vessels after active and standardized treatment, and generally will not have serious complications after healing. If the patient manages his daily life strictly, he can survive for a long time and his life expectancy is usually not affected. If the lower wall myocardial infarction is more extensive, the amount of surviving myocardium is not enough to support the normal work of the heart after rescue treatment, which will lead to a decline in cardiac function, thus affecting the quality of the patient’s life and work, and shortening his or her survival time. Sudden death may occur if the patient is not treated in time and if a malignant arrhythmia such as ventricular fibrillation suddenly occurs at the time of myocardial infarction. Therefore, patients with inferior wall myocardial infarction should seek timely medical treatment and actively cooperate with doctors to improve the prognosis and reduce the risk.