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- W2010011292 abstract "The presence of hyperglycemia prior to stroke or cardiac arrest can increase neuronal damage caused by brain ischemia. Acute hyperglycemia shows this effect in animal models of stroke. However, chronic hyperglycemia and chronic hyperglycemia with additional acute elevation of blood glucose are more common premorbid states for stroke patients. The effect of chronic hyperglycemia on regional cerebral blood flow (rCBF) is unclear but blood flow changes may play a role in this ischemic cell damage. We measured rCBF in awake restrained rats that had chronic hyperglycemia induced by treatment with streptozotocin. This was compared to that measured in rats made acutely hyperglycemic by injecting glucose into the peritoneal space. rCBF was measured in 17 brain regions using [14C]iodoantipyrine. During chronic hyperglycemia, when plasma glucose was 29 microns/ml, rCBF was decreased and a regional distribution of this effect was noted; 9 hindbrain regions showed a mean flow decrease of 14% while forebrain regions demonstrated less flow reduction. Acute elevation of plasma glucose during normoglycemia or superimposed on chronic hyperglycemia produced flow reductions of 7% for each 10 microns/ml increment in plasma glucose up to 60 microns/ml. Both chronic and acute hyperglycemia are associated with decreased rCBF and the mechanism for this effect does not appear to adapt to chronic hyperglycemia." @default.
- W2010011292 created "2016-06-24" @default.
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- W2010011292 date "1987-01-01" @default.
- W2010011292 modified "2023-10-15" @default.
- W2010011292 title "Regional cerebral blood flow decreases during chronic and acute hyperglycemia." @default.
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- W2010011292 doi "https://doi.org/10.1161/01.str.18.1.52" @default.
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