| Hemodynamic evaluation of the CarboMedics prosthetic heart valve in the aortic position: comparison of noninvasive and invasive techniques. | |
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MedLine Citation:
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PMID: 1729819 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Seventy-three patients with a CarboMedics aortic bileaflet valve prosthesis were examined by Doppler ultrasonography, and 27 of them were also assessed by transseptal catheterization. The ultrasonic mean systolic gradient was 17.1 +/- 5.6 mm Hg for valve size 19 mm, falling gradually with increasing valve size to 6.8 +/- 2.5 mm Hg for size 27 mm. The catheter mean systolic gradient was consistently smaller than the ultrasonic gradient (4.3 +/- 4.8 mm Hg), but Tobit regression analysis showed a significant association between the two methods. In all patients both methods revealed negligible to small amounts of retrograde leakage, which is assumed to be a normal finding for this valve. The effective flow areas of the valves calculated from the ultrasonic data were similar to the in vitro calculated flow areas. The hemodynamic potential of this valve is therefore completely utilized in vivo. The effective orifice area corrected for body surface area increased with increasing valve size, which demonstrates a moderate valve-patient mismatch. |
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Authors:
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H Ihlen; P Mølstad; S Simonsen; K Vatne; E Ovrum; O Geiran; P Laake; T Frøysaker |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: American heart journal Volume: 123 ISSN: 0002-8703 ISO Abbreviation: Am. Heart J. Publication Date: 1992 Jan |
Date Detail:
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Created Date: 1992-02-11 Completed Date: 1992-02-11 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0370465 Medline TA: Am Heart J Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 151-9 Citation Subset: AIM; IM |
Affiliation:
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Medical Department B, Rikshospitalet, Oslo, Norway. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Analysis of Variance Aortic Valve / physiopathology, ultrasonography Aortic Valve Insufficiency / diagnosis, ultrasonography Echocardiography, Doppler* Female Follow-Up Studies Heart Catheterization* Heart Valve Prosthesis* Hemodynamics* Humans Male Middle Aged Prosthesis Design Regional Blood Flow Regression Analysis |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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