吸烟可引起脑血管收缩,使脑血流量明显减少。长期吸烟并不都发生晕厥。作者报告1例吸烟后立即发生晕厥者,其~(99m)Tc-HMPAO脑SPECT图像显示吸烟或嚼含尼古丁口香糖引起的后循环灌注下降。 患者,男,77岁,1996年8月31日因晕厥,意识丧失而入院。半个月内于吸烟后4次发生晕厥,2次失去知觉,伴下肢无力,大小便失禁。自17岁开始吸烟, Smoking can cause cerebral vasoconstriction, so that cerebral blood flow decreased significantly. Long-term smoking and not all syncope. The authors reported 1 patient who had syncope immediately after smoking and had ~ 99m Tc-HMPAO brain SPECT images showing a decrease in posterior circulation perfusion caused by smoking or chewing nicotine-containing chewing gum. Patient, male, 77 years old, admitted to hospital on the 31st of August 1996 due to syncope and loss of consciousness. Half within 4 months after smoking syncope, 2 loss of consciousness, with lower limb weakness, incontinence. Since the age of 17 began to smoke,