Document Detail


The effect of nimodipine on the evolution of human cerebral infarction studied by PET.
MedLine Citation:
PMID:  2661584     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Fourteen patients were studied by positron emission tomography (PET) within 48 h of onset of a hemispheric ischemic stroke and again 7 days later. After the first set of PET scans, the patients were randomized to receive either nimodipine (n = 7) or a carrier solution (n = 7) by intravenous infusion. The infusions were maintained until the end of the second PET studies. CBF, cerebral blood volume (CBV), oxygen extraction ratio (OER), CMRO2, and CMRglc were measured each time. These metabolic and perfusion measurements were performed by standard methods. A surface map of each metabolic and perfusion measurement in the cortical mantle was generated by interpolating between the available slices. The various surface maps representing the physiological characteristics determined in the same or subsequent studies were aligned so that all data sets could be analyzed identically using an array of square regions of interest (ROIs). The functional status of each ROI was recorded at the two intervals following the cerebrovascular accident to characterize the evolution of the infarct, penumbra, and normal brain regions. We presumed the ischemic penumbra to be cortical regions in the proximity of the infarct and perfused at CBF values between 12 and 18 ml/100 g/min on the first PET scan, while densely ischemic regions had CBF of less than 12 nl/100 g/min and normally perfused brain greater than 18 ml/100 g/min. In the densely ischemic zone, CBF increased more in the nimodipine-treated group than in the carrier group. As well, in this region nimodipine reversed the decline in CMRO2 noted in the carrier group, the difference in the changes being significant. In the penumbra zone, comparable trends were noted in OER and CMRO2 but the difference in the changes between the two groups did not reach statistical significance. Changes in CMRglc and CBV were comparable between the two groups in both cortical regions.
Authors:
A M Hakim; A C Evans; L Berger; H Kuwabara; K Worsley; G Marchal; C Biel; R Pokrupa; M Diksic; E Meyer
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism     Volume:  9     ISSN:  0271-678X     ISO Abbreviation:  J. Cereb. Blood Flow Metab.     Publication Date:  1989 Aug 
Date Detail:
Created Date:  1989-08-08     Completed Date:  1989-08-08     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8112566     Medline TA:  J Cereb Blood Flow Metab     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  523-34     Citation Subset:  IM    
Affiliation:
McConnell Brain Imaging Centre, Montreal Neurological Institute, Quebec, Canada.
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Blood Flow Velocity / drug effects
Brain Ischemia / physiopathology
Cerebral Infarction / drug therapy,  metabolism,  physiopathology*
Cerebrovascular Circulation / drug effects
Female
Humans
Male
Middle Aged
Nimodipine / administration & dosage,  pharmacology*
Perfusion
Tomography, Emission-Computed*
Chemical
Reg. No./Substance:
66085-59-4/Nimodipine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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