Document Detail

Reproducibility of measurements of coronary narrowings by videodensitometry and by digital calipers.
MedLine Citation:
PMID:  1301249     Owner:  NLM     Status:  MEDLINE    
Computer-assisted videodensitometry has been shown to be a reliable and reproducible method of measuring absolute and relative coronary narrowings. Using a commercially available analyzer (Vanguard XR70) we confirmed intra- and interobserver reproducibilities in 34 narrowings in 9 patients. Analyses were performed on normal area and diameter, stenotic area and diameter, percent area stenosis and percent diameter stenosis. For all 6 analyses, excellent intra- and interobserver correlations were found (r = 0.93-0.98), with slopes close to 1 and intercepts close to zero. Caliper measurements (Mitutoyo Digimatic) of the same lesions by the same observers showed good inter- and intraobserver reproducibility for percent diameter stenosis (r = 0.90 and 0.86), with mean interobserver difference of 1.67 +/- (SD) 6.4% and intraobserver difference of 2.97 +/- (SD) 7.9%. However, less good correlations were found between caliper and videodensitometric measurements of percent diameter stenosis; r = 0.61 and 0.76 for the two observers. These data suggest that videodensitometry is a highly reproducible quantitative angiographic method, suitable for documenting changes in the severity of coronary artery lesions, both spontaneous or related to interventions. Caliper measurements do not provide the same degree of accuracy, but they have acceptable reproducibility in measuring diameter stenosis. As such, they are also suitable for assessing changes in severity of coronary artery lesions in individual patients.
J Balkin; D Rosenmann; M Ilan; M M Zion
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Cardiology     Volume:  81     ISSN:  0008-6312     ISO Abbreviation:  Cardiology     Publication Date:  1992  
Date Detail:
Created Date:  1993-06-03     Completed Date:  1993-06-03     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  1266406     Medline TA:  Cardiology     Country:  SWITZERLAND    
Other Details:
Languages:  eng     Pagination:  238-44     Citation Subset:  IM    
Department of Cardiology, Shaare Zedek Medical Center, Jerusalem, Israel.
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MeSH Terms
Angioplasty, Transluminal, Percutaneous Coronary
Cineangiography / instrumentation*
Coronary Angiography / instrumentation*
Coronary Disease / radiography*
Observer Variation
Radiographic Image Interpretation, Computer-Assisted / instrumentation*
Reproducibility of Results
Vascular Resistance / physiology

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

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