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- W2415499699 abstract "We investigated middle cerebral artery flow velocity (MCA-FV) by a noninvasive method to determine whether or not smoking causes an increase in cerebral blood flow (CBF). Furthermore we determined sequentially the changes in CBF caused by smoking in order to evaluate changes in responses at different times in daily activities and the effect from meals. The subjects were 25 healthy individuals ranging in age from 20 to 36 yr. MCA-FV was measured by a transcranial Doppler system. They smoked a filtered cigarette for 5 min at 1 P.M., 3 P.M., 6 P.M., 8 P.M., 10 P.M., 8 A.M., and 11 A.M. Results (1) Smoking caused increases in both common carotid artery flow volume and MCA-FV, and the percentage increase of these parameters showed a good correlation (r = 0.809). (2) MCA-FV increased significantly during the first (by 6.6%) and second halves (by 5.4%) of the smoking period. (3) The change in MCA-FV after meals was slight. (4) Smoking tended to increase MCA-FV during each smoking session but the changes were not significant. The pulsatility index reduced significantly during almost every smoking session. These results lead to the conclusion that smoking reduces vascular resistance in cerebral arteries and increases CBF." @default.
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- W2415499699 date "1993-06-01" @default.
- W2415499699 modified "2023-09-23" @default.
- W2415499699 title "A study on cerebral nicotine receptor distribution, blood flow, oxygen consumption, and other metabolic activities--a study on the effects of smoking on carotid and cerebral artery blood flow." @default.
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