Coronary angiography is to send the top of the contrast catheter to the left and right coronary artery orifices to inject contrast for imaging to understand the filling of coronary contrast, it can show the lesion site, the degree of stenosis, especially for some patients with atypical symptoms or asymptomatic but with ischemic changes in the electrocardiogram is more important, it clearly confirms or excludes the diagnosis of coronary heart disease. Guangming Pan, Cardiovascular Disease Specialist, Guangdong Provincial Hospital of Traditional Chinese Medicine