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• W2959303487 abstract "CO 2 -reactivity and neurovascular coupling are sequentially lost within the first 24 h after subarachnoid hemorrhage (SAH). Whether and when these impairments recover is not known. Therefore, we investigated the reactivity of pial and intraparenchymal vessels by in vivo two-photon microscopy one month after experimental SAH. C57BL/6 mice were subjected to either sham surgery or SAH by filament perforation. One month later, cerebral blood flow following CO 2 -challenge and forepaw stimulation was assessed by laser Doppler fluxmetry. Diameters of pial and intraparenchymal arterioles were quantified by in vivo two-photon microscopy. One month after SAH, pial and parenchymal vessels dilated in response to CO 2 . Neurovascular coupling was almost completely absent after SAH: vessel diameter did not change upon forepaw stimulation compared to a 20% increase in sham-operated mice. The current results demonstrate that neurovascular function differentially recovers after SAH: while CO 2 -reactivity normalizes within one month after SAH, neurovascular coupling is still absent. These findings show an acute and persistent loss of neurovascular coupling after SAH that may serve as a link between early brain injury and delayed cerebral ischemia, two distinct pathophysiological phenomena after SAH that were so far believed not to be directly related." @default.
• W2959303487 created "2019-07-23" @default.
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• W2959303487 date "2019-07-11" @default.
• W2959303487 modified "2023-09-27" @default.
• W2959303487 title "Long-term impairment of neurovascular coupling following experimental subarachnoid hemorrhage" @default.
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• W2959303487 doi "https://doi.org/10.1177/0271678x19863021" @default.
• W2959303487 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7238370" @default.
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• W2959303487 hasPublicationYear "2019" @default.
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