Heart disease due to iodine allergy can not do coronary CT examination, can be replaced by other examination items, such as the consideration of plate exercise test, dopamine test, cycling, exercise load ECT and other tests to determine the heart coronary artery stenosis, myocardial ischemia. If a patient with heart disease is allergic to iodine, he or she cannot undergo coronary CT and can change to other tests under the guidance of a doctor. There are many ways to check for heart disease, if the patient is allergic to iodine and cannot undergo coronary CT, he can take into account his own situation and ask his doctor for guidance. Once diagnosed, patients should actively cooperate with doctors to take relevant treatment measures.