| New echocardiographic windows for quantitative determination of aortic regurgitation volume using color Doppler flow convergence and vena contracta. | |
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MedLine Citation:
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PMID: 10190521 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Color Doppler images of aortic regurgitation (AR) flow acceleration, flow convergence (FC), and the vena contracta (VC) have been reported to be useful for evaluating severity of AR. However, clinical application of these methods has been limited because of the difficulty in clearly imaging the FC and VC. This study aimed to explore new windows for imaging the FC and VC to evaluate AR volumes in patients and to validate this in animals with chronic AR. Forty patients with AR and 17 hemodynamic states in 4 sheep with strictly quantified AR volumes were evaluated. A Toshiba SSH 380A with a 3.75-MHz transducer was used to image the FC and VC. After routine echo Doppler imaging, patients were repositioned in the right lateral decubitus position, and the FC and VC were imaged from high right parasternal windows. In only 15 of the 40 patients was it possible to image clearly and measure accurately the FC and VC from conventional (left decubitus) apical or parasternal views. In contrast, 31 of 40 patients had clearly imaged FC regions and VCs using the new windows. In patients, AR volumes derived from the FC and VC methods combined with continuous velocity agreed well with each other (r = 0.97, mean difference = -7.9 ml +/- 9.9 ml/beat). In chronic animal model studies, AR volumes derived from both the VC and the FC agreed well with the electromagnetically derived AR volumes (r = 0.92, mean difference = -1.3 +/- 4.0 ml/beat). By imaging from high right parasternal windows in the right decubitus position, complementary use of the FC and VC methods can provide clinically valuable information about AR volumes. |
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Authors:
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T Shiota; M Jones; D A Agler; R W McDonald; C P Marcella; J X Qin; A D Zetts; N L Greenberg; L A Cardon; J P Sun; D J Sahn; J D Thomas |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: The American journal of cardiology Volume: 83 ISSN: 0002-9149 ISO Abbreviation: Am. J. Cardiol. Publication Date: 1999 Apr |
Date Detail:
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Created Date: 1999-04-16 Completed Date: 1999-04-16 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0207277 Medline TA: Am J Cardiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1064-8 Citation Subset: AIM; IM; S |
Affiliation:
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Department of Cardiology, The Cleveland Clinic Foundation, Ohio 44195, USA. shiotat@cesmtp.ccf.org |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Aged Animals Aortic Valve / physiopathology, ultrasonography Aortic Valve Insufficiency / physiopathology, ultrasonography* Blood Flow Velocity Child Child, Preschool Echocardiography, Doppler, Color / methods* Electromagnetic Phenomena Humans Image Processing, Computer-Assisted Infant Infant, Newborn Middle Aged Observer Variation Sheep |
| Investigator | |
Investigator/Affiliation:
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J D Thomas / Cleveland Clinic Found, OH |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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