Why does smoking cause high blood pressure? At present, it is believed that it is mainly caused by nicotine, a highly toxic substance in tobacco. Nicotine can stimulate the heart and adrenal gland to release a large amount of catecholamine, make the heart beat faster, vasoconstriction, blood pressure rise. Some scholars have found that smoking an ordinary cigarette can increase the systolic blood pressure by 1.3-3.3kpa (10-30mmhg). Smoking a large amount of cigarettes for a long time, that is to say, smoking 30-40 cigarettes a day can cause the continuous contraction of small arteries. Over time, the smooth muscle of small artery wall degenerates, the intima of blood vessels gradually thickens and arteriosclerosis forms. Smoking also has an impact on blood lipid metabolism, can make blood cholesterol, low-density lipoprotein increased, high-density lipoprotein decreased, therefore, the process of atherosclerosis is accelerated, prone to rapid malignant hypertension, subarachnoid hemorrhage and coronary heart disease, myocardial infarction, etc., in addition, there are data show that smoking habits in patients with hypertension, due to reduced sensitivity to antihypertensive drugs Low, antihypertensive treatment is not easy to obtain satisfactory results, and even have to increase the dose.
It can be seen that smoking has a great influence on high blood pressure. Therefore, it is advised that smokers, especially patients with high blood pressure, should give up this bad habit in time.
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