Document Detail

Vertebral artery occlusion in duplex color-coded ultrasonography.
MedLine Citation:
PMID:  15060317     Owner:  NLM     Status:  MEDLINE    
BACKGROUND AND PURPOSE: To establish the diagnostic criteria for the site of occlusion in the vertebral arteries (VAs) using duplex color-coded ultrasonography. METHODS: In 128 consecutive patients who underwent conventional cerebral angiography, we prospectively measured the diameter, mean flow velocity (MV), peak systolic flow velocity, and end-diastolic flow velocity of both VAs. The diameter-ratio (diameter of contralateral VA divided by that of target VA) and MV-ratio (MV of contralateral VA divided by that of target VA) were determined. Based on the angiographic findings, we classified the VAs into 4 types (5 groups) as follows: (1) the origin of VA occlusion (Origin group: n=9); (2) VA occlusion before branching into the posterior inferior cerebellar artery (PICA) (Before group: n=10); (3A) symptomatic VA occlusion after branching into the PICA (After group: n=12); (3B) asymptomatic or hypoplastic occlusive VA after branching into the PICA (PICA end group: n=15); and (4) no significant occlusive lesions in the VA (Control group: n=194). RESULTS: No flow signals in the VAs apparently indicated the Origin group. Preserved peak systolic flow velocity but end-diastolic flow velocity of zero cm/s indicated the Before group. MV <18 cm/s and MV-ratio > or =1.4 indicated the PICA end group or After group. Furthermore, these groups could be distinguished as follows: a diameter-ratio <1.4 indicated the After group. A diameter-ratio > or =1.4 indicated the PICA end group. Either MV > or =18 cm/s or MV <18 cm/s in combination with MV-ratio <1.4 indicated the Control group. CONCLUSIONS: Duplex color-coded ultrasonography can accurately diagnose the site of VA occlusion.
Kozue Saito; Kazumi Kimura; Kazuyuki Nagatsuka; Keiko Nagano; Kazuo Minematsu; Satoshi Ueno; Hiroaki Naritomi
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2004-04-01
Journal Detail:
Title:  Stroke; a journal of cerebral circulation     Volume:  35     ISSN:  1524-4628     ISO Abbreviation:  Stroke     Publication Date:  2004 May 
Date Detail:
Created Date:  2004-04-23     Completed Date:  2004-05-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0235266     Medline TA:  Stroke     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1068-72     Citation Subset:  IM    
Cerebrovascular Division, of Medicine, National Cardiovascular Center, Japan.
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MeSH Terms
Angiography, Digital Subtraction
Arterial Occlusive Diseases / radiography,  ultrasonography*
Arteries / ultrasonography
Blood Flow Velocity
Cerebellum / blood supply
Cerebral Angiography
Middle Aged
Prospective Studies
Sensitivity and Specificity
Ultrasonography, Doppler, Color
Ultrasonography, Doppler, Duplex
Vertebral Artery / radiography,  ultrasonography*

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