To determine coronary artery disease clinically, the following aspects need to be detected I. Clinical manifestations, mainly presenting as chest tightness and chest pain in the precordial region after activity, with or without radiating pain in the left posterior back and left upper arm. Second, electrocardiogram can show myocardial ischemia, cardiac ultrasound can also detect localized myocardial dyskinesia, and ambulatory electrocardiogram can detect myocardial ischemia. Other auxiliary examinations, such as myocardial nuclear testing, can also detect abnormalities, and coronary CTA can also detect vascular stenosis. Laboratory tests, such as myocardial enzyme profile, troponin T, and anterior cerebral natriuretic peptide, can be abnormal. Fourth, coronary artery disease is mostly combined with other high-risk factors, such as hypertension, hyperglycemia, hyperlipidemia, obesity, smoking and family history of coronary artery disease. In short, through the above aspects, basically coronary heart disease can be identified.