| Validation and applications of indexed aortic prosthetic valve areas calculated by Doppler echocardiography. | |
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MedLine Citation:
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PMID: 2387937 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Doppler echocardiographic evaluation of aortic valve prostheses is based on the use of variables heretofore validated mostly for native valves. Accordingly, this study examined the validity and relative usefulness of the Doppler valve gradient and area measurements in 31 patients (mean age 69 +/- 10 years) 20 +/- 4 months after implantation of a given type of aortic bioprosthesis ranging in size from 19 to 29 mm. Valve area data obtained with both the standard and simplified continuity equations were compared with known in vitro prosthetic valve area measurements and an excellent correlation was obtained between the standard and simplified continuity equations (r = 0.98, SEE +/- 0.07 cm2, p less than 0.0005) and between in vivo and known in vitro prosthetic valve areas (r = 0.86, SEE +/- 0.16 cm2, p less than 0.0005). Peak gradient ranged from 10.8 to 75.0 mm Hg (mean 35 +/- 16) and mean gradient from 7.6 to 43.7 mm Hg (mean 20.5 +/- 9.5). The correlations between prosthetic valve gradient and in vivo area were r = -0.53, SEE +/- 14 mm Hg and r = -0.49, SEE +/- 8.63 mm Hg for peak and mean gradient, respectively. These relations were improved by indexing valve area by body surface area. The best correlations were obtained between indexed valve area and a quadratic function of the gradient (r = -0.72, SEE +/- 11.72 mm Hg and r = -0.70, SEE +/- 7.28 mm Hg for peak and mean gradient, respectively), reflecting a curvilinear relation.(ABSTRACT TRUNCATED AT 250 WORDS) |
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Authors:
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J G Dumesnil; G N Honos; M Lemieux; J Beauchemin |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of the American College of Cardiology Volume: 16 ISSN: 0735-1097 ISO Abbreviation: J. Am. Coll. Cardiol. Publication Date: 1990 Sep |
Date Detail:
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Created Date: 1990-09-21 Completed Date: 1990-09-21 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 8301365 Medline TA: J Am Coll Cardiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 637-43 Citation Subset: AIM; IM |
Affiliation:
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Quebec Heart Institute, Laval University, Sainte-Foy, Canada. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aged Aortic Valve Stenosis / diagnosis, surgery* Bioprosthesis* Body Surface Area Echocardiography, Doppler* Female Follow-Up Studies Heart Valve Prosthesis* Humans Male Mitral Valve Postoperative Period Prosthesis Design |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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