Lateral wall myocardial infarction refers to necrosis of the lateral wall myocardial cells of the left ventricle. The lateral wall of the left ventricle is supplied by the gyrus branch of the left coronary artery, and blockage of the blood vessels of the gyrus branch of the left coronary artery causes necrosis of the lateral wall myocardial cells of the left ventricle. Lateral wall myocardial infarction is divided into anterior, inferior, and high lateral wall. The ECG will show pathological Q waves and ST-segment elevation in the corresponding leads, accompanied by significant chest pain and increased cardiac enzymes, which are typical clinical manifestations of myocardial infarction and require active treatment. If the resuscitation is not timely, it will cause complications such as malignant arrhythmia and acute left heart failure, and the condition will endanger the patient’s life.