Maintenance of cerebral blood flow and metabolism during pharmacological hypotension in aged hypertensive rats.

Abstract:

:Cerebral blood flow (CBF) and cerebral oxygen metabolism (CMRO2) were measured in aged (24 month) spontaneously hypertensive rats (SHR) during sodium nitroprusside (SNP) and nitroglycerin induced hypotension. Both CBF and CMRO2 were decreased in SHR during hypotension induced with SNP. Significant decrements in CMRO2 were observed in aged SHR during even moderate hypotension (80-90 torr). Cerebral autoregulatory responses during nitroglycerin infusion in aged SHR were similar to SNP treated WKY and CMRO2 was maintained at control levels under all hypotensive test conditions. These results indicate that aged SHR are susceptible to cerebral ischemia during SNP induced hypotension, probably due to the combined effects of aging and hypertension on the cerebral vasculature. NTG moderated the decreases in CBF and CMRO2 seen during hypotensive challenges and may decrease the risk of stroke during hypotensive anesthesia.

journal_name

Neurobiol Aging

journal_title

Neurobiology of aging

authors

Hoffman WE,Miletich DJ,Albrecht RF

doi

10.1016/0197-4580(82)90003-3

subject

Has Abstract

pub_date

1982-07-01 00:00:00

pages

101-4

issue

2

eissn

0197-4580

issn

1558-1497

pii

0197-4580(82)90003-3

journal_volume

3

pub_type

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