Document Detail


New generation tissue valves. Their in vitro function in the mitral position.
MedLine Citation:
PMID:  6482489     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The in vitro function of six tissue valves from four manufacturers has been assessed. One porcine bioprosthesis (Carpentier-Edwards supra-annular) and five pericardial valves (Edwards, Hancock, Ionescu-Shiley, Ionescu-Shiley low-profile, and Mitral Medical Mitroflow) were tested. Valve function was measured in a pulse duplicator simulating conditions of sinus rhythm (60, 80, and 120 beats/min and stroke volume 70 ml) and supraventricular tachycardia (200 beats/min and stroke volume 30 ml). Under each of these test conditions, mean transvalvular pressure, regurgitation, and transvalvular energy loss were determined and used to compare valve function. The porcine valve showed the largest mean transvalvular pressure during forward flow. The total energy loss of this valve, however, was not the largest for the valves tested. The total transvalvular energy loss ranged between 3% and 12% for all valves and conditions. For all valves, energy loss and regurgitation were greatest during simulated tachycardia.
Authors:
D K Walker; L N Scotten; R T Brownlee
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of thoracic and cardiovascular surgery     Volume:  88     ISSN:  0022-5223     ISO Abbreviation:  J. Thorac. Cardiovasc. Surg.     Publication Date:  1984 Oct 
Date Detail:
Created Date:  1984-11-05     Completed Date:  1984-11-05     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0376343     Medline TA:  J Thorac Cardiovasc Surg     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  573-82     Citation Subset:  AIM; IM    
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MeSH Terms
Descriptor/Qualifier:
Bioprosthesis
Equipment Design
Evaluation Studies as Topic
Heart Valve Prosthesis / standards*
Hemodynamics*
Humans
Mitral Valve / physiology*
Pressure
Stroke Volume

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


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