Cardiac coronary angiography can show the alignment and lesions of the coronary arteries more clearly, but is generally not a good indicator of aortic dissection. Aortic dissection (AD) is a serious cardiovascular emergency that occurs when blood enters the middle layer of the aorta, dividing it into true and false lumens and causing severe tearing pain. Cardiac coronary angiography is generally used for coronary artery disease, such as coronary atherosclerosis, and does not usually fill the aorta, so aortic coarctation cannot be detected. In addition, when AD is suspected, cardiac ultrasound and CT angiography (CTA) of the entire aorta should be performed as soon as possible to confirm the diagnosis and to avoid aggravation of symptoms. Specific treatment should be prescribed by a physician.