| Color velocity imaging quantification in the detection of intracranial collateral flow. | |
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MedLine Citation:
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PMID: 12105355 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND AND PURPOSE: The development of intracranial collateral circulation is associated with a lower risk of stroke. A noninvasive technique that can reliably detect the presence of intracranial collaterals would be a valuable factor in the assessment of risk in patients with occlusive cerebrovascular disease. METHODS: Color velocity imaging quantification was used to measure the blood flow volume of the common carotid and vertebral arteries in 40 patients with carotid occlusive disease. The blood flow volumes in these arteries were correlated with angiographic evidence of collaterals to establish the best cutoffs for detecting intracranial collateral circulation. RESULTS: A blood flow volume of either > or =370 mL/min in the common carotid artery or > or =120 mL/min in the vertebral artery was indicative of the presence of intracranial collaterals. The sensitivity and specificity for the common carotid artery were 92.3% [95% confidence interval (CI), 62.1 to 99.6] and 92.1% (95% CI, 77.5 to 97.9), respectively. The sensitivity and specificity for the vertebral artery were 75.0% (95% CI, 35.6 to 95.5) and 87.5% (95% CI, 66.5 to 96.7), respectively. CONCLUSIONS: Color velocity imaging quantification offers a noninvasive, accurate method for detecting the presence of intracranial collateral circulation and quantifying its magnitude. This technique would be a useful adjunct in screening or continuous monitoring of patients with severe carotid occlusive disease. |
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Authors:
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S S Y Ho; C Metreweli; C H Yu |
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Publication Detail:
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Type: Clinical Trial; Journal Article |
Journal Detail:
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Title: Stroke; a journal of cerebral circulation Volume: 33 ISSN: 1524-4628 ISO Abbreviation: Stroke Publication Date: 2002 Jul |
Date Detail:
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Created Date: 2002-07-09 Completed Date: 2002-08-06 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 0235266 Medline TA: Stroke Country: United States |
Other Details:
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Languages: eng Pagination: 1795-8 Citation Subset: IM |
Affiliation:
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Department of Radiology and Organ Imaging, Prince of Wales Hospital, Yuen Chau Kok, Shatin, Hong Kong. stellaho@cuhk.edu.hk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Angiography, Digital Subtraction Blood Flow Velocity / physiology Carotid Artery, Common / radiography, ultrasonography Carotid Stenosis / radiography, ultrasonography* Cerebral Angiography Cerebrovascular Circulation / physiology* Collateral Circulation / physiology* Female Humans Male Predictive Value of Tests Sensitivity and Specificity Severity of Illness Index Ultrasonography, Doppler, Color* Vertebral Artery / radiography, ultrasonography |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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