Shortness of breath after cardiac stenting is treated as follows: 1. Consider whether there are tiny vascular lesions caused by it. The stent can mainly solve the most serious stenosis, but these tiny vascular lesions cannot be stented and will produce shortness of breath after stenting, at this time, you can consider improving the tiny vascular lesions with drugs like Nicorandil. 2, stent in the process of placing will have a certain damage to the endothelium, which is inevitable, and inflammation will occur in the process of vascular repair, and lead to shortness of breath and chest tightness after stenting. This situation will get better after some time. 3.It is also possible that some small plaques are unstable after stent placement, resulting in micro-vascular lesions. 4.It is also possible that the blood vessel after stent is stenosed again, or other blood vessels may be stenosed, then it is necessary to go to the hospital to review the coronary angiography and decide the next step of treatment according to the situation. At the same time, the heart function should be reviewed.