The diagnostic methods of coronary heart disease are as follows: 1. History inquiry: including the inquiry of risk factors and clinical symptoms (such as angina pectoris, myocardial infarction, or heart failure, etc.). 2, Electrocardiogram: including resting electrocardiogram, electrocardiogram load test and dynamic electrocardiogram. 3.Biochemical markers test: such as cardiac enzyme spectrum, troponin, etc.. 4, Imaging examination: including echocardiography, radionuclide examination and X-ray examination, selective coronary angiography is the gold standard for the diagnosis of coronary heart disease. Generally speaking, in daily life, if there are the following phenomena should consult a doctor in time: pain in the post-sternal or anterior thoracic area when exercising or exertion, the pain is pressure or squeezing feeling, and some of them can be radiated to the neck, shoulder and arm. Often feel palpitations, chest tightness or even dyspnea during physical activity, full meal, cold or nervousness. Feeling breathlessness and dyspnea at night while lying down to sleep, needing to sit up to relieve. Recurrent episodes of post-exertional sore throat, left shoulder pain, or epigastric pain, which are repeatedly unrelieved by general treatment.