The familiar phrase “smoking is hazardous to health” has been heard many times, yet not many people can take this phrase as a health tip, and continue to smoke cigarettes, not knowing that this smoking is actually destroying their own health. According to medical research: smoking has a significant role in promoting coronary heart disease, the age of onset of coronary heart disease in smokers is 4 to 5 years earlier than in non-smokers, and the incidence is directly proportional to the amount of smoking. In fact, this is the reason why coronary heart disease occurs more often in smokers. For most smokers, smoking not only relieves stress at work, but also reduces irritability. However, they do not know that smoking is one of the main factors that trigger coronary heart disease! So, what are the specific aspects of the relationship between smoking and coronary heart disease? 1, smoking destroys lipid metabolism, increasing the hardening of the vascular arteries Smoking can raise serum cholesterol, causing disorders of lipid metabolism, thus accelerating the degree of atherosclerosis of the vessel wall, and the occurrence and development of coronary heart disease provides the basis for atherosclerosis. Smoking is hazardous to health 2, increase the incidence of coronary heart disease angina and even infarction Myocardial hypoxia itself is one of the initiating factors of damage to the endothelium, smoking can make the permeability of the endothelium increased, thus destroying the endothelium, creating conditions for the aggregation of platelets and lipid deposition, prompting the formation of atherosclerosis, or make the already formed atherosclerotic plaque stability is destroyed, becoming angina or The cause of angina or heart attack. Under the same conditions, the faster the heart rate and the higher the blood pressure, the higher the myocardial oxygen consumption, which will aggravate the coronary arteries with insufficient blood supply to the heart muscle and increase the occurrence of angina pectoris or infarction. When the endothelial function of blood vessels is damaged, the chance of vasospasm increases, which increases the chance of heart attack. In most infarction patients, vasospasm occupies a part of the proportion, can be seen as one of the important factors that increase angina and infarction attack. 3, smoking increases myocardial hypoxia, easy to lead to myocardial hypoperfusion After smoking, the blood carbon monoxide concentration increases, so that the blood hemoglobin and carbon monoxide binding rate increases, which will reduce the combination of oxygen and hemoglobin, thereby reducing the oxygen supply to the myocardium, resulting in increased myocardial ischemia and hypoxia. In fact, the effect of smoking on coronary heart disease is because people smoke will inhale a lot of nicotine, which contains toxic substances into the body will have an impact on cardiovascular, lipid and blood clotting function, and then cause hypertension, hypercholesterolemia, atherosclerosis, sudden cardiac death, coronary heart disease and other cardiovascular diseases. Smoking is recognized as a predisposing factor for coronary heart disease, and is one of the important triggering and initiating factors for myocardial infarction. However, treatment is better than prevention and medication is better than quitting smoking, as long as the earlier the age of quitting smoking, the better the prevention effect on coronary heart disease will be.