The incidence of coronary heart disease, hypertension and other cardiovascular diseases is significantly higher in smokers than in non-smokers. And this is just the tip of the iceberg of the harm caused by smoking. Let’s take a look at the cardiovascular and cerebrovascular hazards of smoking. 1, increased blood pressure Cigarettes contain a large amount of nicotine, these toxic substances will lead to increased secretion of adrenaline and thyroxine in the body, which can make the heart rate increase, blood pressure rise, resulting in adverse consequences. 2, accelerate atherosclerosis Smokers will be due to vasoconstriction or spasm, increased resistance to blood flow, resulting in damage to the blood vessel wall, platelet release and aggregation, increased blood viscosity, accelerating the heart, brain, kidney and other systemic organs atherosclerosis, but also able to reduce lipoproteins, prompting thrombosis, increasing the risk of coronary artery blockage, will prompt coronary artery spasm. 3, induced sudden death Smoking can also induce sudden death, even if some people with a lesser degree of atherosclerosis, may also lead to myocardial infarction, or even death, but also increase the risk of peripheral vascular disease and stroke, coronary heart disease patients with sudden death due to smoking is the most important cause of ventricular fibrillation triggered by the toxic substances in tobacco. 4, brain damage Carbon monoxide in cigarettes can cause hypoxia in the endothelial cells of the blood vessel wall, contributing to atherosclerosis. Nicotine in cigarettes can also reduce high-density lipoprotein and increase low-density lipoprotein, thus aggravating atherosclerosis. In addition, cerebral vascular sclerosis, damage to brain cells, damage to memory and mental disorders can also occur. 5, increase the chances of congenital heart disease Smoking is very bad for pregnant women and fetuses, in addition to causing fetal growth retardation, low weight, but also make the future development of children shorter than children of the same age, physical fitness will also be poor. In addition, the incidence of congenital heart disease in babies is significantly higher, two to three times higher than in babies born to non-smoking women.