Coronary heart disease is also known as the “first human killer”. According to the World Health Organization, about 17 million people around the world die of coronary heart disease every year, accounting for more than 50% of deaths from the disease. In China, the number of coronary heart disease patients is as high as 60 million, with the continuous improvement of material living standards, the incidence of coronary heart disease is increasing, after 40 years of age, every 10 years, the prevalence rate will increase by about 1 times. Coronary heart disease is the most common cardiovascular disease in the middle-aged and elderly, how to prevent and treat coronary heart disease has become a hot spot of concern for the whole society. So how to detect coronary heart disease early? When the following conditions occur, it is important to seek medical attention to detect coronary heart disease as early as possible. 1.Dull pain behind the sternum or precordial area or tightness-like pain when exerting or nervous, and radiating to the left shoulder and left upper arm, lasting 3-5 minutes, relieved by itself after resting; 2.Thoroughness, palpitation and shortness of breath when physically active, relieved by itself when resting; 3.Thoroughness and palpitation when having a full meal, cold or watching a thriller; 4.Sleeping at night with a low pillow, you will feel chest tightness and breath-holding, and need to lie on a high pillow 5.Sudden chest pain, palpitation and difficulty in breathing when sleeping or lying down during the day, which can be relieved by sitting up or standing up immediately; 6.Panic, chest tightness, shortness of breath or chest pain when straining to defecate or having sex; 7.Panic and chest tightness when hearing the sound of gongs and drums or other noises around; 8.Recurrent irregular pulse, unexplained tachycardia or bradycardia. In particular, dizziness and transient syncope. If any of the above conditions occur, please go to the hospital promptly and ask a specialist to help diagnose the condition.