The diagnosis of angina pectoris is confirmed as follows: 1. Diagnosis is made by whether the patient has the corresponding symptoms, such as whether there is exertional chest pain, shortness of breath, chest discomfort, etc.; 2. Diagnosis is confirmed by whether the patient has susceptibility factors, such as whether there is hypertension, diabetes, hyperlipidemia, whether to stay up late, alcoholism; 3. Diagnosis is confirmed by objective index examination, such as through laboratory tests of blood lipids, liver function, kidney function, the need to understand whether there is myocardial ischemia through electrocardiogram, you can understand whether the heart is enlarged through X-ray, cardiac ultrasound, through coronary angiography directly show whether there is a narrowing of the coronary arteries, resulting in insufficient blood supply to the heart muscle.