Selective reduction of blood flow to white matter during hypotension in newborn dogs: a possible mechanism of periventricular leukomalacia.

Abstract:

:The cerebrovascular response of newborn animals to hypotension has not been defined on a regional basis. Using an autoradiographic technique employing 14C-iodoantipyrine as indicator, we studied the cerebral physiological responses of newborn dogs to hypotension induced by exsanguination or by administration of Escherichia coli endotoxin. Regional cerebral blood flow (rCBF) to all gray matter structures was preserved, even at mean arterial pressures as low as 20 mm Hg. In contrast, rCBF to periventricular and occipital white matter decreased significantly during severe hypotension. The selective hypoperfusion of cerebral white matter during severe hypotension may provide a mechanistic explanation for the pathogenesis of periventricular leukomalacia.

journal_name

Ann Neurol

journal_title

Annals of neurology

authors

Young RS,Hernandez MJ,Yagel SK

doi

10.1002/ana.410120506

subject

Has Abstract

pub_date

1982-11-01 00:00:00

pages

445-8

issue

5

eissn

0364-5134

issn

1531-8249

journal_volume

12

pub_type

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