Document Detail

Evaluation of reproducibility of a vessel wall movement detector system for assessment of large artery properties.
MedLine Citation:
PMID:  8025904     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Arterial distensibility (DC) and compliance (CC) are vessel wall properties of large arteries that can be measured non-invasively with a custom made vessel wall movement detector system (VWMDS). This study investigated the reproducibility of this device in 10 volunteers. METHODS: To investigate intraobserver intrasession and intraobserver intersession variability, arterial diameter (D) and relative change in diameter during the heart cycle (delta D/D) were measured in the elastic common carotid artery, and in the muscular femoral and brachial arteries. Interobserver intrasession variability was examined in common carotid artery by two observers, while interobserver variability on the same image was assessed for common carotid and femoral arteries. Variability was expressed as the coefficient of variation. RESULTS: For common carotid artery, intraobserver intrasession variability was 7.9(SEM 1.6)% (delta D/D), 4.5(1.1)% (D), 8.3(1.3)% (DC), and 9.1(2.6)% (CC), respectively. In femoral artery it was 12.4(2.2)% (delta D/D), 2.7(0.6)% (DC), 13.4(2.2)% (DC), and 12.5(2.1)% (CC). For brachial artery it was 13.4(2.8)% (delta D/D), 2.5(0.5)% (D), 16.1(2.5)% (DC), and 15.6(2.6)% (CC). Intraobserver intersession variability was comparable to intraobserver intrasession variability for all vessels. Interobserver intrasession variability for common carotid artery was 11.3(2.6)% (delta D/D) and 8.6(1.9)% (D), but was larger for DC and CC. Interobserver variability on the same image was < 5% for common carotid and femoral arteries. CONCLUSIONS: In conclusion, the vessel wall movement detector system has a good technical reproducibility. Intraobserver intrasession and intersession variability are comparable, and are larger in muscular arteries. This might be due to a larger variation in tone of these arteries, which are under permanent neurohumoral control. Interobserver intrasession variability was larger than intraobserver variability and might be influenced by differences in observers' skill and spontaneous variation in vessel wall properties.
M J Kool; T van Merode; R S Reneman; A P Hoeks; H A Struyker Boudier; L M Van Bortel
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Cardiovascular research     Volume:  28     ISSN:  0008-6363     ISO Abbreviation:  Cardiovasc. Res.     Publication Date:  1994 May 
Date Detail:
Created Date:  1994-08-05     Completed Date:  1994-08-05     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0077427     Medline TA:  Cardiovasc Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  610-4     Citation Subset:  IM    
Cardiovascular Research Institute, University of Limburg, Maastricht, The Netherlands.
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MeSH Terms
Arteries / physiology*
Brachial Artery / physiology,  ultrasonography
Carotid Artery, Common / physiology,  ultrasonography
Femoral Artery / physiology,  ultrasonography
Middle Aged
Observer Variation
Radio Waves / diagnostic use*
Reproducibility of Results
Vasoconstriction / physiology*

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

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