Early detection, early diagnosis and early treatment are of great significance to the efficacy and prognosis of diseases, and coronary heart disease is no exception. If the following conditions occur, seek medical attention to detect coronary heart disease as early as possible so as not to delay the condition 1.Posterior sternal or precordial area dullness or tightness-like pain when exertion or mental tension occurs and radiates to the left shoulder and left upper arm for 3-5 minutes, which relieves itself after rest; 2.Physical activity with chest tightness, palpitation and shortness of breath, which relieves itself after rest; 3.Exercise-related headache, toothache and leg pain; 4.Physical pain and palpitation when full meal, cold or watching a thriller; 5.Night When sleeping with a low pillow, the person feels tightness and breathlessness in the chest and needs to lie on a high pillow to feel comfortable; when sleeping or lying down during the day, the person suddenly has chest pain, palpitations and difficulty in breathing, which can be relieved by sitting up or standing up immediately; 6, when having sexual intercourse or defecating with force, the person has panic, chest tightness, shortness of breath or chest pain; 7, when hearing the sound of gongs and drums or other noises around, the person has panic and chest tightness; 8, the person has recurrent irregular pulse, unexplained rapid or slow heartbeat. 8.People who repeatedly have irregular pulse, unexplained rapid or slow heartbeat.