Coronary atherosclerotic heart disease (referred to as coronary heart disease) contrast CT can be done and can not be done, the specific circumstances related to the condition, need to be analyzed specifically. 1. Can not be done: contrast CT is enhanced CT, need to inject the contrast agent, if the patient is allergic to the contrast agent, this time can not be done, because continue to do may cause life-threatening allergy. 2. Can be done: for patients suspected of having coronary atherosclerotic heart disease, temporarily do not want to carry out invasive tests (coronary angiography), you can choose the coronary artery CTA to make a preliminary judgment, if the stenosis is serious, then the need to further improve the coronary angiography. After coronary stenting, enhancement CT will also be chosen as a review. Note: Whether patients with coronary artery disease can do enhanced CT, in addition to the reasons for exclusion of contrast allergy, but also need to assess the patient’s vital signs and condition, etc.. It is necessary to visit the hospital and follow the instructions.