Patients with suspected coronary artery disease need to observe electrocardiogram, cardiac enzyme profile, BNP (brain natriuretic peptide), echocardiogram, coronary artery CTA, and, if possible, improve coronary arteriography is recommended. Specific examinations and treatments need to follow the doctor’s instructions. Patients with suspected coronary artery disease should immediately improve the electrocardiogram (ECG), and the ECG of patients with coronary artery disease may show ST-segment changes or T-wave abnormalities. The results of the ECG can be used to make a preliminary estimate of the presence of coronary artery disease and the possible location of the lesions. Coronary artery CTA can give a preliminary idea of the degree of coronary artery stenosis. Then at the same time need to draw blood to check the myocardial enzyme spectrum index for the detection of myocardial infarction sensitivity and specificity is high, BNP can reflect the patient’s condition of the degree of risk. Clinical diagnosis of coronary heart disease is the gold standard of coronary arteriography, in the examination of the catheter from other arteries, inserted into the coronary artery, injected with contrast medium, so as to observe the situation of the coronary arteries and their branches, arterial blockage of more than 70%, can be implanted with a stent. Patients with coronary artery disease need to keep their mood calm and follow the doctor’s instructions for appropriate treatment. It is recommended to carry nitroglycerin, quick-acting heart pills and other medications with you.