Stent surgery requires about 5-7 days of hospitalization. Stent surgery in the clinic is to carry out coronary angiography for cardiac stent implantation, is a kind of interventional surgery, before the operation need to improve the relevant examination, liver function, kidney function, biochemical examination, cardiac enzymes, electrocardiogram, coronary artery CTA and other tests, these preoperative examination needs a certain amount of time, about 1~2 days. After the preoperative examination, coronary angiography is needed to determine the severity of coronary artery stenosis according to the results of coronary angiography, if the severity of stenosis is more than 75%, it is necessary to implant a stent for treatment, and after implanting a stent, it is necessary to observe the patient for 2-3 days, and the patient can be considered to be discharged if he/she is not uncomfortable. If the patient has myocardial infarction and other problems implantation of stents for treatment, the need for emergency green channel treatment, after the operation to observe the patient’s symptoms, it is recommended to consult the cardiovascular internal medicine department of the regular hospital.