Doppler echocardiography of 119 normal-functioning St Jude Medical mitral valve prostheses: A comprehensive assessment including time-velocity integral ratio and prosthesis performance index

Joseph F. Malouf, Manfredi Ballo, Heidi M. Connolly, David O. Hodge, Regina M. Herges, Charles J. Mullany, Fletcher A Jr. Miller

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Abstract

The purpose of this study was to provide, in a large number of patients, comprehensive Doppler echocardiographic assessment of normal St Jude Medical mitral valve prosthesis function using Doppler-derived hemodynamic variables, including the mitral valve prosthesis-to-left ventricular outflow tract time-velocity integral ratio and prosthesis performance index. The pressure half-time was less than 130 milliseconds in all patients, and all but one patient had either a peak early mitral diastolic velocity of 2 m/s or less or a mitral valve prosthesis-to-left ventricular outflow tract time-velocity integral ratio of less than 2.2. There was a significant (P <. 001) negative correlation between the prosthesis performance index and prosthesis size. This negative correlation suggests that there is more efficient use of the in vitro geometric orifice area with smaller prostheses.

Original languageEnglish (US)
Pages (from-to)252-256
Number of pages5
JournalJournal of the American Society of Echocardiography
Volume18
Issue number3
DOIs
StatePublished - Mar 2005

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ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Radiology Nuclear Medicine and imaging

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