Once a high lateral wall myocardial infarction occurs, an electrocardiogram, cardiac ultrasound, coronary CT, coronary angiography and other tests should be performed in the hospital to clarify the location and extent of the infarction. In ECG, high lateral wall myocardial infarction is characterized by T-wave inversion or hyperacusis in leads I and avl, severe depression of the ST segment, and even arch-back elevation. If this occurs, it is likely that a high lateral wall myocardial infarction is present and requires continuous cardiac monitoring and continuous oxygen inhalation upon presentation to the hospital. In addition, coronary dilation and anticoagulant medication should be given, and if necessary, coronary angiography and coronary stenting should be performed for the patient’s safety and recovery.