Normal people try not to do cardiography, it will affect the body. Cardiography is a procedure in which a contrast agent is injected into the arteries of the body to visualize the degree of narrowing of the coronary arteries of the heart, and is mainly used for patients with coronary heart disease, angina pectoris or myocardial infarction. Cardiac imaging has many adverse effects, such as radiation effects, allergic reactions to contrast media, risk of renal insufficiency, bleeding, and infections, so normal people should not undergo cardiac imaging as much as possible. If a patient has a heart problem and needs to have a cardiogram, he or she should go to a regular hospital and see a professional doctor to evaluate whether the test is necessary in the light of the patient’s condition. If you are allergic to the contrast agent, you should not have the imaging test. Severe heart failure or serious arrhythmia is also not suitable for imaging examination