Chest tightness and breath-holding after cardiac stenting surgery is first considered to be an abnormal manifestation, and requires a visit to the hospital to find out the cause. There are two possibilities for chest tightness and breathlessness after cardiac stent surgery: 1. Reoccurrence of blood clots in the stent, resulting in poor blood supply to the heart causing symptoms. Most patients will take antiplatelet drugs for a long time after stent implantation, usually preferred double antiplatelet, that is, aspirin enteric-coated tablets and clopidogrel bisulfate tablets are taken at the same time, the purpose is to prevent thrombosis in the stent, which is relatively rare. A small number of patients with thrombus aggregation will affect blood flow, the ischemia that occurs is not only breath holding, but also angina symptoms. 2. Great postoperative psychological concerns and mental stress may lead to sleep deprivation, causing symptoms of vegetative nerve dysfunction, which may lead to somatization disorders, and symptoms of dyspnea may occur, but they do not lead to symptoms of angina pectoris. Regardless of which type leads to breath-holding symptoms, it is necessary to consult a doctor in time and preferred electrocardiogram and cardiac ultrasound to exclude organic heart disease, so as not to delay treatment and delay the condition.