Cardiac ultrasound can see myocardial necrosis, especially for patients with coronary heart disease and unstable angina pectoris, cardiac ultrasound can intuitively show myocardial movement and heart function, and can suggest to clinicians the location of myocardial necrosis and myocardial ischemia, but small-scale necrosis is not easy to observe. In addition, cardiac ultrasound for congenital heart disease is also the preferred method of examination, but also one of the important examination in cardiovascular disease, can through the ultrasound to understand the degree of heart valve lesions, such as mitral or tricuspid insufficiency, aortic stenosis combined with the degree of closure of the insufficiency of the aortic valve, to determine the patient’s next step in the conservative treatment, surgical treatment, and so on, the specific selection of the treatment mode. However, myocardial necrosis seen through ultrasound can not be used as a direct diagnostic basis, but also through myocardial enzymes blood and other markers of myocardial infarction to make a comprehensive judgment.