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Hemodynamic performance of the Ionescu-Shiley valve prosthesis by Ronald M. Becker; Joel Strom; William Frishman; Yasu Oka; Yen Tse Lin; Edward L. Yellin; Robert W.M. Frater is a Medicine article available to read on EtoBox.

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## Hemodynamic performance of the Ionescu-Shiley valve prosthesis The hemodynamic performance of the lonescu-Shiley bovine heterograft valve has been evaluated by intraoperative measurement of transvalvular gradients and cardiac outputs, Effective orifice areas (EOAs) were calculated and the data compared to those obtained by other investigators for other prostheses, In the aortic position. each valve, from 19 to 31 mm external diameter. produced a pressure gradient; mean EGA increased with increasing valve size. so that small (19 to 23 mm} valves were moderately stenotic and larger valves were only mildly stenotic. The presence of a mitral prosthesis produced larger transuortic valve gradients. probably as a result of aortic outflow obstruction by the mitral prosthesis, The lonescu valve appears to he hemodynamically superior to other biological valves in the aortic position and comparable to most mechanical prostheses. although the data for comparison are scant, Each mitral valve produced a pressure gradient and. on the average. larger (29 mm) valves performed no better than smaller (25 mm}, Mean EOAs for each valve size (25 to 29 mm} were adequate to provide satisfactory hemodyn

Who reads Hemodynamic performance of the Ionescu-Shiley valve prosthesis?

Author

Ronald M. Becker; Joel Strom; William Frishman; Yasu Oka; Yen Tse Lin; Edward L. Yellin; Robert W.M. Frater

Publisher

CTSNet; American Association for Thoracic Surgery; Mosby Inc.; Elsevier BV; Publons (ISSN 1097-685X)

Published

1980

Language

EN

Field

Medicine (Health Sciences)