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pubmed-article:11018245pubmed:abstractTextDespite their potential use as cerebral vasodilatory agents there are few studies of the effect of nitric oxide (NO) donors on the cerebral circulation in non-anaesthetised man. We determined the effect of the NO donor glyceryl trinitrate (GTN) at clinically relevant doses on global and regional cerebral blood flow (CBF) in healthy non-anaesthetised volunteers, using H(2)(15)O PET, ultrasonic colour velocity flow imaging of carotid artery flow, and transcranial Doppler (TCD) of middle cerebral artery velocities (MCAv). Three rates of GTN infusion (0.1, 0.4, 1.0 microg/kg/min) were used. There was no significant change in common or internal carotid artery flow following GTN administration although a dose dependent fall in MCAv post GTN was observed. There was no significant change in either global or regional CBF following GTN. Thus intravenous GTN at therapeutic doses in awake humans does not alter global or regional CBF. However it does produce basal cerebral artery vasodilatation as evidenced by a fall in MCAv in the absence of a change in internal carotid artery flow.lld:pubmed
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pubmed-article:11018245pubmed:articleTitleThe effect of the nitric oxide donor glyceryl trinitrate on global and regional cerebral blood flow in man.lld:pubmed
pubmed-article:11018245pubmed:affiliationDepartment of Clinical Neurosciences, Guy's King's and St Thomas' School of Medicine and Institute of Psychiatry, London, UK.lld:pubmed
pubmed-article:11018245pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:11018245pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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