Document Detail


Limitations of color flow Doppler imaging in the quantification of valvular regurgitation: velocity of regurgitant jet, rather than volume, determines size of color Doppler image.
MedLine Citation:
PMID:  8322661     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The objective of this study was to determine the validity of estimation of regurgitant volume by visual assessment of color flow Doppler display. An experimental apparatus was designed that is capable of ejecting precise volumes of echogenic material from one chamber to another under continuous color flow Doppler monitoring. The velocity of flow was altered independently by changing either the size of the orifice through which flow occurred or the ejection rate. In this manner the differential effects of volume and velocity on the color flow Doppler image could be examined. The maximum area encompassed by the color flow Doppler pattern for each ejection was planimetered by using commercially available on-line software. In addition the reviewer in each case applied a subjective grade to the appearance of the color flow jet (1+ to 4+). Comparison was then made of the color flow Doppler appearance of equal volumes flowing at different velocities and of different volumes flowing at different velocities. In the initial series a solution of agitated hetasarch was used. When equal volumes were imaged at different velocities the higher-velocity jet appeared larger, both subjectively (3+ vs 1+) and by measuring the area encompassed in the Doppler flow profile (40.3 +/- 1.8 vs 22.0 +/- 1.4 cm2, p = 0.0001). Furthermore, when different volumes were imaged at different velocities, the smaller volume (3 ml vs 6 ml) appeared larger when it was flowing at higher velocity (3+ vs 2+, 40.3 +/- 1.8 vs 32.4 +/- 1.3 cm2, p = 0.0006). These experiments were repeated with blood, confirming the results of the initial study.(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
D W Losordo; J O Pastore; D Coletta; D Kenny; J M Isner
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  American heart journal     Volume:  126     ISSN:  0002-8703     ISO Abbreviation:  Am. Heart J.     Publication Date:  1993 Jul 
Date Detail:
Created Date:  1993-08-03     Completed Date:  1993-08-03     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0370465     Medline TA:  Am Heart J     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  168-76     Citation Subset:  AIM; IM    
Affiliation:
Department of Medicine (Cardiology), St. Elizabeth's Hospital, Tufts University School of Medicine, Boston, MA 02135.
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MeSH Terms
Descriptor/Qualifier:
Blood Flow Velocity
Blood Volume
Echocardiography, Doppler*
Heart Valve Diseases / physiopathology,  ultrasonography*
Humans
Models, Cardiovascular*
Grant Support
ID/Acronym/Agency:
HL40518/HL/NHLBI NIH HHS

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


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