Document Detail

Detection of symptomatic vasospasm after subarachnoid haemorrhage: initial findings from single time-point and serial measurements with arterial spin labelling.
MedLine Citation:
PMID:  22653285     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: To detect symptomatic hemispheres during the postoperative course of subarachnoid haemorrhage (SAH) using arterial spin labelling (ASL).
METHODS: Eighteen patients with aneurysmal SAH were included; four exhibited symptomatic vasospasm postoperatively. All patients underwent ASL on days 9-10 (single time-point ASL). Nine patients underwent serial measurements of ASL (serial ASL) on days 1-2, 9-10 and 13-21, and seven patients also underwent imaging on days 4-7. CBF in the posterior part of the MCA territory was measured, and the ipsilateral/contralateral ratio of CBF was calculated. Differences between symptomatic hemispheres and others underwent ROC analysis.
RESULTS: Single time-point ASL revealed that CBF(day9-10) and CBF(i/c_day9-10) were significantly lower in symptomatic hemispheres than in asymptomatic hemispheres (P < 0.001). Serial ASL was significantly decreased on CBF(day4-7) compared with CBF(day1-2) and on CBF(day9-10) compared with CBF(day4-7), and significantly increased on CBF(day13-21) compared with CBF(day9-10). ROC analysis of single time-point ASL revealed that AUC for CBF(day9-10) was 0.95, significantly higher than CBF(i/c_day9-10) (P < 0.001). ROC analysis of serial ASL showed that AUC for CBF(day9-10) was 0.93 and significantly higher than CBF(day9-10/day1-2) and CBF(i/c_day9-10) (P < 0.001).
CONCLUSIONS: Single time-point ASL revealed significant CBF reduction in symptomatic hemispheres compared with asymptomatic hemispheres. Serial ASL showed time-dependent CBF changes after SAH.
KEY POINTS : • MR arterial spin labelling (ASL) can non-invasively assess cerebral blood flow (CBF) • ASL revealed significant CBF reduction in symptomatic hemispheres compared with asymptomatic hemispheres • Serial ASL measurements enable observation of time-dependent CBF changes after SAH • ASL is non- invasive and suitable for serial repeated examinations.
Kunihiro Aoyama; Yasutaka Fushimi; Tomohisa Okada; Akihiro Miyasaki; Hideaki Taki; Kazunori Shibamoto; Kaori Togashi
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Publication Detail:
Type:  Journal Article     Date:  2012-06-01
Journal Detail:
Title:  European radiology     Volume:  22     ISSN:  1432-1084     ISO Abbreviation:  Eur Radiol     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-10-16     Completed Date:  2013-04-02     Revised Date:  2013-11-06    
Medline Journal Info:
Nlm Unique ID:  9114774     Medline TA:  Eur Radiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  2382-91     Citation Subset:  IM    
Department of Neurosurgery, Ichinomiyanishi Hospital, Kaimei, Ichinomiya, 494-0001, Japan.
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MeSH Terms
Arteries / physiopathology
Cerebrovascular Circulation
Diagnostic Imaging / methods
Middle Aged
ROC Curve
Spin Labels
Subarachnoid Hemorrhage / complications,  physiopathology*
Time Factors
Vasospasm, Intracranial / diagnosis*,  physiopathology
Reg. No./Substance:
0/Spin Labels

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

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