The diagnosis of angina attack is as follows: a. Angina attack is often triggered by emotional excitement, labor and other factors. The attack is manifested as pain in the middle sternum and precordial region, with a feeling of pressure and stuffiness, lasting 3-5 minutes, which can be relieved by sublingual nitroglycerin. Second, the electrocardiogram performance: ST segment depression, T wave flat or inverted, and can gradually recover after the attack. ECG examination is the most common method to detect myocardial ischemia and diagnose angina pectoris. Third, radionuclide examination. Coronary angiography. V. Ultrasound examination of the heart. Acute angina attack should be distinguished from acute myocardial infarction, intercostal neuralgia, cardiac neurosis and other diseases to help timely diagnosis and save lives.