title: Quantitative assessment of mechanical prosthetic valve area by 3-dimensional transesophageal echocardiography.
abstract: OBJECTIVE
  The goal of this study was to assess the geometric orifice area of mechanical valve prostheses by transesophageal 3-dimensional echocardiographic planimetry.
  
  
  RESULTS
  Currently used Doppler methods for prosthetic assessment (orifice area-Doppler) were compared with 3D planimetry for orifice area (orifice area-3D) and with manufacturer's values (orifice area-manufacturer) for the corresponding prosthesis types and sizes and with historical controls provided by Doppler literature (orifice area-literature). Twenty-four mechanical valve prostheses (in 22 patients) were studied: 13 in mitral position and 11 in aortic position. Orifice area-manufacturer, orifice area-Doppler, orifice area-literature, and orifice area-3D were 3.6 +/- 1.1 cm(2), 2.3 +/- 0.9 cm(2), 2.4 +/- 0.9 cm(2), and 2.6 +/- 0.7 cm(2), respectively. Orifice area-manufacturer values were significantly larger. Correlation coefficients between orifice area-3D and orifice area-manufacturer, and between orifice area-3D and orifice area-Doppler and orifice area-literature were 0.83, 0.90, and 0.73, respectively (all P < .0001).
  
  
  CONCLUSIONS
  Three-dimensional transesophageal echocardiography is feasible and has good correlation with orifice area-Doppler (in aortic position) and good correlation with orifice area-manufacturer (in aortic and mitral positions) methods.
authors.affiliation: Department of Cardiology, University Hospital VU, Amsterdam, The Netherlands. hfj.mannaerts@azvu.nl
authors.forename: H
authors.initials: H
authors.lastname: Mannaerts
authors.forename: Y
authors.initials: Y
authors.lastname: Li
authors.forename: O
authors.initials: O
authors.lastname: Kamp
authors.forename: G
authors.initials: G
authors.lastname: Valocik
authors.forename: J
authors.initials: J
authors.lastname: Hrudova
authors.forename: S
authors.initials: S
authors.lastname: Ripa
authors.forename: C
authors.initials: C
authors.lastname: Visser
mesh_terms: D000328:Adult; D000368:Aged; D001021:Aortic Valve / Q000000981:diagnostic imaging; D017548:Echocardiography, Transesophageal / Q000379:methods; D005240:Feasibility Studies; D005260:Female; D006350:Heart Valve Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000000981:diagnostic imaging; D013997:Time Factors