Many people think that smoking is smoking into the lungs, which has a large impact on the lungs and may have less impact on other organs, which is why some people do not quit or do not want to quit. In fact, smoking is very harmful to the cardiovascular system and is greater than the respiratory system. Regular smoking causes coughing, which causes obvious harm, but the unseen harm is often greater. Smoking raises cholesterol and damages endothelial function, which can cause cardiovascular events, such as strokes, myocardial infarction, and angina. Atherosclerosis has three most dangerous killers, the first of which is smoking, followed by hypertension, the third is diabetes, and hyperlipidemia are harmful. The impact of smoking on the blood vessels is often invisible to the naked eye or unnoticeable to the next person, so it is more harmful. So the majority of patients are urged to stay away from smoking, do not smoke, smoking is very harmful to cardiovascular, many patients are very young, no family history, hypertension, diabetes and other risk factors, but after consultation confirmed to be myocardial infarction, eventually after asking a history of smoking, in the 20s and 30s on the disease, the lesson is very big.