title: Doppler echocardiography of normal Starr-Edwards mitral prostheses: a comprehensive function assessment including continuity equation and time-velocity integral ratio.
abstract: The purpose of this study was to provide comprehensive Doppler echocardiographic assessment of the function of the normal Starr-Edwards mitral valve prosthesis using all the Doppler hemodynamic variables described to date, including the mitral valve prosthesis time-velocity integral (TVI)/left ventricular outflow tract TVI ratio and the prosthesis performance index. All patients had a peak early mitral diastolic velocity of no more than 2 m/s or a pressure half-time that was less than 130 milliseconds. All but one patient had either a peak early mitral diastolic velocity of no more than 2 m/s or a mitral valve prosthesis TVI/left ventricular outflow tract TVI ratio of less than 2.2, regardless of prosthesis size or left ventricular systolic function. There was a trend of decreasing prosthesis performance index with increasing prosthesis valve size that was not statistically significant, however.
authors.affiliation: Divison of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota 55905, USA.
authors.forename: Joseph F
authors.initials: JF
authors.lastname: Malouf
authors.forename: Manfredi
authors.initials: M
authors.lastname: Ballo
authors.forename: David O
authors.initials: DO
authors.lastname: Hodge
authors.forename: Regina M
authors.initials: RM
authors.lastname: Herges
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Orszulak
authors.forename: Fletcher A
authors.initials: FA
authors.lastname: Miller
mesh_terms: D000328:Adult; D000368:Aged; D015150:Echocardiography, Doppler / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis / Q000379:methods; D005260:Female; D006349:Heart Valve Diseases / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery*; D006350:Heart Valve Prosthesis; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000000981:diagnostic imaging* / Q000601:surgery*; D020127:Recovery of Function; D016896:Treatment Outcome; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging* / Q000209:etiology / Q000517:prevention & control