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很久以来,人们对于烟草的使用,起初只认为是一种坏习惯,而不是从健康上考虑。近年釆着重于医学方面考虑吸烟问题,认为吸异物入肺,会产生有害的结果。一、早期的研究 1.烟硷烟草对心血管系统的近期作用,主要是由烟硷而产生的。主要有心律、血压、每搏输出量、心输出量、心肌收缩力及心肌耗氧量增加的变化,所以心肌负荷增加,要求耗氧量相应增大。若冠状动脉变窄,在供血量减少的情况下,则需要增大供血量。烟硷使
For a long time, the use of tobacco for people was at first considered only a bad habit, not a matter of health. In recent years, focusing on the issue of smoking in medicine, the issue of absorbing foreign substances into the lungs has been shown to have detrimental consequences. First, the early research 1. Nicotine tobacco on the cardiovascular system’s recent role, mainly caused by nicotine. Mainly heart rate, blood pressure, stroke volume, cardiac output, myocardial contractility and myocardial oxygen consumption increased changes, so myocardial load increased, the corresponding increase in oxygen consumption. If the coronary artery narrows, in the case of reduced blood supply, you need to increase the amount of blood supply. Nicotine make