期刊
JOURNAL OF CEREBRAL BLOOD FLOW AND METABOLISM
卷 36, 期 4, 页码 696-701出版社
NATURE PUBLISHING GROUP
DOI: 10.1177/0271678X15624699
关键词
Hippocampus; tissue oxygen; hyperemia; physiological stimulation; subarachnoid hemorrhage; vasospasm; optical imaging; neurovascular coupling; hemodynamics
资金
- American Heart Association
- DVAMC Merit Review
We investigated microvascular reactivity to synaptic train stimulation after induction of subarachnoid hemorrhage in adult rats, analyzing tissue oxygen levels [pO(2)] in intact hippocampus. In control rats, hippocampal pO(2) averaged 11.4mm Hg whereas hemodynamic responses averaged 13.1mm Hg (to a 25 s train). After subarachnoid hemorrhage (at 2 days), we recorded a dramatic elevation in baseline pO(2) in the hippocampus (to 68.4mm Hg) accompanied by inverted pO(2) responses to synaptic train stimulation (-9.46mm Hg). These significant changes in baseline hippocampal pO(2) and inverted pO(2) responses after subarachnoid hemorrhage indicate severe alterations of neurovascular coupling and neuronal viability.
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