The length of hospitalization required for coronary angiography is uncertain, and the length of hospitalization is related to factors such as preoperative examination, the patient’s physical condition, and postoperative results. 1. Pre-operative examination: a series of examinations, such as cardiac ultrasound, chest X-ray, blood test, urine test, stool test, etc., need to be carried out before the coronary angiography to assess whether the patient’s physical condition can tolerate the operation. 2. Patient’s physical condition: If the patient is not feeling well after the angiography, such as nausea, vomiting, dyspnea, etc., the patient needs to be treated under the guidance of the doctor, and the hospitalization time will be prolonged accordingly. 3. Post-operative effect: If severe stenosis is found during coronary angiography, stents need to be implanted. If the patient’s symptoms such as chest tightness and chest pain are not relieved after the operation, further treatment is needed and the hospitalization time will be extended. The length of hospitalization will fluctuate depending on factors such as the pre-procedure examination, the patient’s physical condition, and the post-procedure results. If you are not feeling well after the imaging, please follow the doctor’s instructions for treatment.