The manifestations of myocardial ischemia cardiac ultrasound can be divided into the following three conditions: 1. When the symptoms are in the early stage, the ultrasound shows normal or slightly enlarged left ventricular internal diameter, reduced local contractile motion of the ventricular wall of the left ventricle, mildly impaired systolic and diastolic function, and the patient may occasionally experience angina pectoris and dyspnea during exercise. 2. Typical myocardial ischemia ultrasound manifestations include enlarged left heart, reduced overall systolic function of the left ventricle, and The symptoms of myocardial ischemia may be aggravated by the weakening or disappearance of the ischemic ventricular wall motion, which affects the ejection of blood from the left ventricle to the aorta, and patients may experience angina pectoris, dyspnea, and palpitations at rest or during exercise. 3. Severe myocardial ischemia may lead to myocardial infarction, which is characterized by significant enlargement of the left ventricle, thinning of the ventricular wall in the infarcted area, uneven echogenicity of the affected myocardium, disappearance of systolic motion, and paradoxical motion, with the development of Ventricular wall tumors, left ventricular appendage thrombosis, and septal perforation are also present. Ischemic heart disease is a type of disease caused by insufficient blood supply to the myocardium due to narrowing or blockage of the coronary arteries, which is usually called coronary heart disease, and the consequences due to coronary heart disease are very serious and should be detected, diagnosed and treated early.