Application of the continuity equation and valve resistance to the evaluation of St. Jude Medical prosthetic aortic valve dysfunction

Robert M. Saad, John Barbetseas, Leopoldo Olmos, Nelly Rubio, William A. Zoghbi

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

In summary, the application of the continuity equation and valve resistance provides a reliable method to distinguish whether high velocities and gradients through St. Jude aortic valves are secondary to obstruction or increased flow. The Doppler parameters that differentiate stenotic from regurgitant and normal valves were effective orifice area, Doppler velocity index, and valve resistance. Whether the use of valve resistance allows a better discrimination between stenotic and normal or regurgitant valves remains to be determined.

Original languageEnglish (US)
Pages (from-to)1239-1242
Number of pages4
JournalAmerican Journal of Cardiology
Volume80
Issue number9
DOIs
StatePublished - Nov 1 1997

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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