Experimental regional cerebral ischemia in the middle cerebral artery territory in primates. Part 3: effects on brain water and electrolytes in the late phase of acute MCA stroke.

Abstract:

:Experimental regional cerebral ischemia was produced in the middle cerebral artery (MCA) territory in primates (M. mulatta) by macrosphere embolization. Determinations of percentage tissue dry weight and tissue sodium and potassium concentrations were obtained in samples from the ischemic and non-ischemic hemispheres at various time from 12 to 48 hours after the onset of cerebral ischemia. Samples from the cortex normally supplied by the occluded MCA showed maximal accumulation of edema fluid with fluxes in sodium and potassium in reciprocal directions at 12 hours and similar edematous changes in putamen at 24 hours after embolization By 48 hours after MCA occlusion and despite the presence of infarction, partial reversal was observed in the redistribution of water and electrolytes in these gray matter structures. In contrast to cerebral cortex and putamen, the adjacent subcortical white matter showed progressive increases in water content from 12 to 48 hours and definite increases in tissue sodium with decreases in potassium were not observed until 48 hours after MCA occlusion. This late severe white matter edema associated with cerebral infarction appears to be a major factor responsible for the hemispheric swelling observed at this state.

journal_name

Stroke

journal_title

Stroke

authors

Bremer AM,Yamada K,West CR

doi

10.1161/01.str.9.4.387

subject

Has Abstract

pub_date

1978-07-01 00:00:00

pages

387-91

issue

4

eissn

0039-2499

issn

1524-4628

journal_volume

9

pub_type

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