Heterogeneities of regional cerebral blood flow during hypoxia-ischemia in the rat

Myron D. Ginsberg, Robert Medoff, Martin Reivich

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

The distribution of regional cerebral blood flow (rCBF) within the cerebral hemispheres of rats was investigated following an hypoxic ischemic insult consisting of a 30 min exposure to 6.5% to 7% inspired oxygen coupled with unilateral ligation of the common carotid artery and maintenance of normal blood pressure (modified Levine preparation). rCBF was estimated by means of an autoradiographic method employing 14C antipyrine. Mean arterial P(O2) values of 26.8 to 27.5 mm Hg were attained during the insult period. rCBF rose above control values in all structures of the hemisphere contralateral to carotid artery ligation. Structures of the hemisphere ipsilateral to arterial ligation exhibited rCBF values less than those of the opposite side. However, the degree to which carotid artery occlusion reduced the rCBF of a structure relative to that of the opposite hemisphere varied greatly from region to region, with the greatest decrements occurring in the lateral cerebral cortex and the caudoputamen. Previous studies in this model have shown that these regions of the hemisphere ipsilateral to carotid artery occlusion are zones of frequent histological injury. These data suggest that inhomogeneities of rCBF may in part determine the phenomenon of 'selective vulnerability' of the nervous system to hypoxia ischemia.

Original languageEnglish (US)
Pages (from-to)132-134
Number of pages3
JournalStroke
Volume7
Issue number2
DOIs
StatePublished - Jan 1 1976
Externally publishedYes

ASJC Scopus subject areas

  • Clinical Neurology
  • Cardiology and Cardiovascular Medicine
  • Advanced and Specialized Nursing

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