Cerebral oxygen metabolism and blood flow in human cerebral ischemic infarction.

Détails

ID Serval
serval:BIB_03A2ED3EC441
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Cerebral oxygen metabolism and blood flow in human cerebral ischemic infarction.
Périodique
Journal of Cerebral Blood Flow and Metabolism
Auteur(s)
Lenzi G.L., Frackowiak R.S., Jones T.
ISSN
0271-678X (Print)
ISSN-L
0271-678X
Statut éditorial
Publié
Date de publication
1982
Volume
2
Numéro
3
Pages
321-335
Langue
anglais
Notes
Publication types: Journal ArticlePublication Status: ppublish
Résumé
Fifteen patients with acute cerebral hemispheric infarcts have been studied with positron emission tomography and the oxygen-15 steady-state inhalation technique. Thirteen follow-up studies were also performed. The values of cerebral oxygen metabolism (CMRO2), cerebral blood flow (CBF), and oxygen extraction ration (OER) have been calculated for the infarcted regions, their borders, the symmetrical regions in contralateral cerebral hemispheres, and the cerebellar hemispheres. This study demonstrates that in the completed stroke there are thresholds for regional CMRO2 and regional CBF below which the general clinical outcome of the patients is usually poor. The ischaemic lesions invariably produce an uncoupling between the greatly decreased metabolic demand and the less affected blood supply, with very frequent instances of relative hyperperfusion. Remote effects of the hemispheric infarcts have been demonstrated, such as crossed cerebellar diaschisis and contralateral transhemispheric depression. The level of consciousness correlates with oxygen uptake and blood flow both in the posterior fossa and in the contralateral cerebral hemispheres. The follow-up studies of individual patients underline the high variability of metabolism-to-flow balance during the acute phase of the illness, and stress the need for more studies focused on repeated assessments of homogeneous patient populations.
Mots-clé
Aged, Brain/metabolism, Brain Ischemia/physiopathology, Cerebral Infarction/physiopathology, Cerebrovascular Circulation, Cerebrovascular Disorders/physiopathology, Cranial Fossa, Posterior/physiopathology, Female, Humans, Longitudinal Studies, Male, Middle Aged, Oxygen Consumption, Oxygen Radioisotopes/diagnostic use, Tomography, Emission-Computed
Pubmed
Web of science
Open Access
Oui
Création de la notice
09/10/2011 18:33
Dernière modification de la notice
20/08/2019 12:25
Données d'usage