Document Detail

CT angiography and perfusion imaging in patients with subarachnoid hemorrhage: correlation of vasospasm to perfusion abnormality.
MedLine Citation:
PMID:  18850093     Owner:  NLM     Status:  MEDLINE    
INTRODUCTION: We retrospectively evaluated computed tomography angiography (CTA) and perfusion imaging (CTP) of patients with aneurysmal subarachnoid hemorrhage (SAH) for any correlation between degree of vasospasm and perfusion deficit. MATERIALS AND METHODS: Sequentially performed CTP and CTA of 41 patients at least at the third day of postbleeding were reviewed for vasospasm and perfusion deficit throughout the anterior and middle cerebral arteries and corresponding territories. Vasospasm was noted comparing the contralateral normal ones or extradural components of the vessel itself and graded to negative, mild, moderate, and severe as luminal narrowing none, <25%, between 25% and 50%, and >or=50%, respectively. CTP abnormality was noted using cerebral blood flow and volume and mean transit time maps. RESULTS: Of 41 patients, 20 had no vasospasm; 15 had mild to moderate and six had severe vasospasm. Three of 20 patients with no vasospasm (15%), four of 15 patients with mild to moderate vasospasm (26%), and five of six patients with severe vasospasm (83%) had perfusion abnormality. Perfusion abnormalities noted were ischemia, infarction, and hyperperfusion. Perfusion abnormality without vasospasm was observed in the watershed areas and adjacent to sulcal clots. CONCLUSION: In SAH patients, if there is a macrovascular vasospasm with luminal narrowing >or=50%, there is a high likelihood (83%) of perfusion abnormality in the territory of the vasospastic vessel. There may also be perfusion abnormality without macrovascular vasospasm in the watershed areas or in the vicinity of sulcal clots.
Ayse Aralasmak; Mahmut Akyuz; Can Ozkaynak; Timur Sindel; Recai Tuncer
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-10-11
Journal Detail:
Title:  Neuroradiology     Volume:  51     ISSN:  1432-1920     ISO Abbreviation:  Neuroradiology     Publication Date:  2009 Feb 
Date Detail:
Created Date:  2009-01-16     Completed Date:  2009-07-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  1302751     Medline TA:  Neuroradiology     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  85-93     Citation Subset:  IM    
Department of Radiology, Akdeniz University, Antalya, Turkey.
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MeSH Terms
Brain Ischemia / complications,  radiography*
Cerebral Angiography / methods*
Perfusion Imaging / methods*
Reproducibility of Results
Sensitivity and Specificity
Statistics as Topic
Subarachnoid Hemorrhage / complications,  radiography*
Tomography, X-Ray Computed / methods*
Vasospasm, Intracranial / complications,  radiography*

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