The side effects of cardiography mainly include damage to blood vessels and damage to the human body caused by contrast medium, but the rate of cardiography side effects is not high, and the examination should not be abandoned for fear of side effects, and the specific examination should be carried out according to the doctor’s instructions. 1. Damage to blood vessels: cardiac imaging needs to puncture the arteries, which can lead to damage to the punctured arteries, resulting in local hematomas, and even the occurrence of osteofascial compartment syndrome, some patients can be arteriovenous fistula, such as the lack of strict aseptic operation, which may lead to the occurrence of infection in the patient. 2. Damage to the human body of contrast media: contrast media will have certain damage to the human body, some patients may be more sensitive to the drug, the injection of drugs may occur allergic reactions, such as rashes, severe anaphylactic shock may occur, life-threatening, the contrast media is mainly excreted through the kidneys, which may lead to renal damage, such as the emergence of drug-induced nephritis. Although the probability of side effects is low, it is important to take precautions to prevent side effects of drugs when performing cardiac imaging to prevent serious complications.