Patients with chronic coronary heart disease often present with stable angina pectoris, and stable angina pectoris refers to each angina attack, induced by labor intensity is basically equal, often in the case of strenuous exercise, emotional excitement, appear in the middle and lower part of the sternum anterior heart area of the fist, palm size range of the stuffiness and pain, discomfort. And angina often lasts 1-5 minutes, giving rest or containing nitroglycerin tablets, the symptoms can be relieved. In addition, patients with chronic coronary artery disease may also have arrhythmias, symptoms of palpitations and panic attacks, and may have a state of cardiac insufficiency, which is characterized by varying degrees of dyspnea. The most common symptom is exertional dyspnea, which may be accompanied by lower extremity edema and other corresponding signs.