The full name of coronary heart disease is coronary atherosclerotic heart disease. The severity of the disease depends on the degree of atherosclerosis in the coronary arteries, the blockage of the blood vessels, and the number of diseased branches. If the degree of atherosclerosis is mild, the blood vessels are only slightly blocked, and only a small section of the blood vessels is blocked, then it is not serious. However, if the degree of atherosclerosis is severe, causing serious blockage of the blood vessels and blockage of multiple branches, the situation is more serious and acute myocardial infarction may occur, which can be life-threatening if not treated in time. As coronary atherosclerosis will lead to narrowing or blockage of blood vessels, which in turn causes myocardial ischemia and hypoxia. Most patients will experience symptoms such as angina pectoris, and the pain can manifest as a sense of near death and last for several minutes to ten minutes. During an acute attack, the patient should rest immediately and take medication such as nitroglycerin as prescribed by the doctor, and immediately seek medical attention or call 120. If the condition of coronary atherosclerosis is mild, the patient can be treated conservatively with medication to relieve pain and antiplatelet therapy as prescribed by the doctor. If the patient’s coronary arteries have been seriously blocked, it is recommended to actively carry out surgical treatment, taking stent implantation or coronary artery bypass grafting.