In vitro assessment of pressure recovery through St. Jude heart valve prostheses

Neil L. Greenberg*, Pieter M. Vandervoort, Alexander I. Veress, Min Pu, Kimerly A. Powell, J. Fredrick Cornhill, James D. Thomas

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Pressure recovery has recently been reported as a possible mechanism for the apparent overestimation of transvalvular pressure gradients by Doppler echocardiography across St. Jude heart valve prostheses when implanted in the aortic position. We have studied the effect of mitral and aortic configurations on downstream pressure recovery in different sized St. Jude valves. Pressure recovery in the central and side orifice was significantly higher for prostheses in the aortic position than for a mitral configuration (p<0.001). Pressure recovery in the side orifice was most effected by the downstream geometry which permitted the most accurate Doppler derived pressure gradients to be obtained in the mitral position across the side orifice (Doppler - catheter = 2.5±1.3 mmHg).

Original languageEnglish (US)
Title of host publicationProceedings of the Annual Conference on Engineering in Medicine and Biology
EditorsAndrew Y.J. Szeto, Rangaraj M. Rangayyan
PublisherPubl by IEEE
Pages911-912
Number of pages2
Volume15
Editionpt 2
ISBN (Print)0780313771
StatePublished - Dec 1 1993
EventProceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 2 (of 3) - San Diego, CA, USA
Duration: Oct 28 1993Oct 31 1993

Other

OtherProceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 2 (of 3)
CitySan Diego, CA, USA
Period10/28/9310/31/93

ASJC Scopus subject areas

  • Bioengineering

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