Coronary heart disease is a common and frequent disease among middle-aged and elderly people. People in this age group should seek medical attention in time to detect coronary heart disease as early as possible if the following conditions occur in their daily life. A. What are the early symptoms of coronary heart disease? 1.Dullness in the posterior sternum or precordial area or tightness-like pain when exertion or mental tension occurs, and radiates to the left shoulder and left upper arm, lasting 3-5 minutes, and relieves itself after rest. 2.Physical activity with chest tightness, palpitation and shortness of breath, which is relieved by itself at rest. 3.Persons with exercise-related headache, toothache, leg pain, etc. 4.People who have chest pain and palpitations when having a full meal, being cold or watching a thrilling movie. 5.When sleeping at night with a low pillow, you feel tightness in your chest and need to lie on a high pillow to feel comfortable; when sleeping or lying down during the day, you suddenly have chest pain, palpitations and difficulty in breathing, which can be relieved by sitting up or standing up immediately. 6.Heart panic, chest tightness, shortness of breath or chest pain when having sex or straining to defecate. 7.Hearing noise will cause panic and chest tightness. 8.Recurring irregular pulse, unexplained tachycardia or excessive Second, how to detect coronary heart disease early? 1.If the test result is abnormal or there are other risk factors for coronary heart disease, blood cholesterol test should be done once or more every five years. 2. Blood pressure check once a year. 3.Glucose check once a year. If you are at high risk for coronary heart disease, you should ask your doctor to see if you need an electrocardiogram. If further examination is needed, the doctor will arrange to do an exercise test to measure the ECG when pedaling a stationary bike or pedaling an exercise tablet. 5. Coronary angiography is the most certain way to diagnose coronary artery disease.