Cardiac imaging, usually referred to as coronary angiography (SCA), does not usually result in death, but adverse effects such as angina, intraoperative hypertension, and contrast reactions may occur. 1. Angina pectoris: It is characterized by retrosternal pain, discomfort or tightness in the precordial area that lasts for several minutes to tens of minutes. The cause may be coronary artery spasm caused by repeated stimulation of the coronary artery or myocardial ischemia caused by too large an injection of contrast medium for a long time. 2. Intraoperative hypertension: usually due to the patient’s history of hypertension and intraoperative stress, blood pressure changes should be closely observed. 3. Reaction to contrast medium: patients mostly have a history of allergy, especially iodine allergy, should do iodine allergy test before operation, and can drink more water after operation to promote the excretion of contrast medium. Coronary angiography (SCA) is the “gold standard” for the diagnosis of coronary atherosclerotic heart disease (coronary heart disease), and it is the examination that must be carried out before coronary heart disease interventional therapy, SCA is a kind of minimally invasive examination, and it is less dangerous. SCA is a minimally invasive test with less risk. However, some adverse reactions may occur, and when adverse reactions occur, they should be actively handled with the doctor.