| Vertebral artery hypoplasia is associated with a decrease in net vertebral flow volume. | |
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MedLine Citation:
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PMID: 19900752 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The definition and clinical significance of vertebral artery hypoplasia (VAH) remain inconclusive. VAH has been proposed as a predisposing factor of posterior circulation ischemic stroke. The aim of this study was to determine a best cut-off diameter of vertebral artery (VA) for VAH and to investigate if unilateral VAH is associated with a decrease in net vertebral flow volume. Retrospective data of 1000 presumably healthy subjects free of cerebrovascular disease or apparent carotid atherosclerosis were analysed. We found that a VA diameter </=2.5mm is an ideal value to define VAH. The flow volume of the identified hypoplastic VA was remarkably low and the contralateral VA had only a slightly increased compensatory flow volume. The net VA flow volumes remained significantly and markedly lower in subjects with unilateral VAH (140.7+/-46.2mL/min) than those in subjects without VAH (190.1+/-54.5mL/min, p<0.001). Flow volume insufficiency of VA (defined as a net VA flow volume less than 100mL/min) occurred more frequently in individuals with VAH than in those without VAH (22.1% vs. 2.4%, p<0.001). Our study suggested that asymptomatic subjects with VAH had a significantly lower net VA flow volume and a higher frequency of VA flow insufficiency than the control group. (E-mail: hhhu@vghtpe.gov.tw). |
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Authors:
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Yen-Yu Chen; A-Ching Chao; Hung-Yi Hsu; Chih-Ping Chung; Han-Hwa Hu |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Ultrasound in medicine & biology Volume: 36 ISSN: 1879-291X ISO Abbreviation: Ultrasound Med Biol Publication Date: 2010 Jan |
Date Detail:
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Created Date: 2009-12-17 Completed Date: 2010-03-02 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0410553 Medline TA: Ultrasound Med Biol Country: England |
Other Details:
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Languages: eng Pagination: 38-43 Citation Subset: IM |
Affiliation:
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Department of Neurology, Changhua Christian Hospital, Changhua, Taiwan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Aged Blood Flow Velocity Blood Volume Female Humans Male Middle Aged ROC Curve Retrospective Studies Ultrasonography, Doppler, Color Vascular Resistance Vertebral Artery / pathology*, ultrasonography* Vertebrobasilar Insufficiency / pathology*, physiopathology, ultrasonography Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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