Cardiac ultrasound examination is required to remove the clothing, the body has a foreign body cover can not be through the coupling agent to form a good acoustic window, will have an impact on the development of tissue structure. Cardiac ultrasound examination needs to apply the coupling agent on the ultrasound probe as well as the skin surface to form a good acoustic window medium, in order to make a clear diagnosis of the various tissue structures of the heart as well as diseases. What must be done before this is to remove the clothing covering the body in order to provide a good diagnostic environment for the whole examination. There are some special cases in the clinic, such as emergency cardiac examination, clothing can not be separated from the body for various reasons, in this case can only be screened without removing the clothing, the results of the examination will be affected by the clothing covering, the local structure will not show clearly. Cardiac ultrasound should be done in accordance with the requirements of the examining doctor to ensure that the results of the examination.