EFFECT OF FILTER-CIGARETTE SMOKING ON CEREBRAL AND PERIPHERAL HEMODYNAMICS

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The circulatory effect of filter-cigarette smoking on cerebral and peripheral circulation, blood pressure and heart rate was investigated in four normal young males and six healthy looking elderly males, all habitual tobacco smokers (1 020 cigarettes daily). (1) The following two types of cerebral blood flow pattern were observed after filter-cigarette smoking, Type I - biphasic blood folw pattern, i.e., initial decreased blood flow followed by increased blood flow and Type II - monophasic blood flow pattern, i.e., increased blood flow without decreased blood flow. The former type was more frequent than the latter, i.e., biphasic type 8 and monophasic type 2. A significant difference in cerebral circulatory response was not observed between the young and elderly subjects. (2) Although a conspicuous alteration in peripheral blood flow was not observed after one or two inhalations, a slight but continuous increased blood flow was observed in one-half of the subjects (5 cases) after several repeated inhalations. The changing rate of peripheral blood flow was slight as compared with the cerebral blood flow. (3) Alterations in blood pressure and heart rate were both slight. The changing rate of both factors was slight with one or two inhalations as compared with several repeated inhalations. (4) The findings suggest that the filter-cigarette is more suitable for habitual smokers, especially patients with various circulatory disorders, as compared with the cigarette without a filter.

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