Cardiac stenting is coronary stenting. The procedure belongs to the scope of cardiology, and it is mainly suitable for cases where patients with coronary artery disease cannot be effectively relieved by medication, where the lesion is located in one or two coronary arteries, and where the coronary artery lesion is relatively confined. For the effect of drug treatment is not satisfactory, the coronary artery stenosis is more diffuse more than three branches of the lesion, suitable for cardiac surgery bypass surgery. With the development of medical devices and techniques, stenting in internal medicine, the scope of application is relatively extended.