Angina pectoris is a group of clinical syndromes of angina pectoris caused by insufficient coronary artery blood supply, which is a contradiction between coronary artery blood supply and myocardial blood demand, and the coronary artery blood flow cannot meet the metabolic needs of myocardium, causing acute and temporary myocardial ischemia and hypoxia. So, how to diagnose anterior chest compression pain? Here is a brief introduction: According to the typical attack characteristics and signs, containing nitroglycerin after the relief, combined with age and the presence of coronary heart disease susceptibility factors, except other causes of angina pectoris, generally can establish the diagnosis. The diagnosis is usually established by the typical features and signs of angina pectoris, including relief with nitroglycerin, age and the presence of coronary factors. A stress test may be considered in patients with unchanged ECG. In patients with atypical attacks, the diagnosis depends on observation of the efficacy of nitroglycerin and changes in the ECG during the attack; if the diagnosis cannot be confirmed, the ECG, ECG stress test or 24-hour continuous monitoring of the ambulatory ECG can be repeated several times, and the diagnosis can be confirmed if there are positive changes in the ECG or if the stress test induces an angina attack. If the diagnosis is difficult, radionuclide examination or selective coronary angiography may be considered. Selective coronary angiography is necessary if surgical treatment is being considered. Intracoronary ultrasound can show lesions in the canal wall and may be more helpful in the diagnosis. Coronary angiography may also be considered.