title: A hybrid approach for quantification of aortic valve stenosis using cardiac magnetic resonance imaging and echocardiography: comparison to right heart catheterization and standard echocardiography.
abstract: We replaced Doppler-derived stroke volume in the continuity equation (method A) by either right heart catheterization-derived stroke volume (method B) or cardiovascular magnetic resonance-derived stroke volume (method C) to calculate aortic valve area in 20 consecutive patients with moderate or severe aortic stenosis. Comparison of both hybrid methods (methods B and C) by Bland-Altman analysis showed a mean difference near zero, a spread within two standard deviations and very similar limits of agreement. More importantly, all patients were classified into the same category of severity by both methods.
authors.affiliation: I. Medizinische Klinik, Universitätsklinikum Mannheim, 68167, Mannheim, Germany. dariush-haghi@med.ma.uni-heidelberg.de
authors.forename: D
authors.initials: D
authors.lastname: Haghi
authors.forename: T
authors.initials: T
authors.lastname: Suselbeck
authors.forename: S
authors.initials: S
authors.lastname: Fluechter
authors.forename: G
authors.initials: G
authors.lastname: Kalmar
authors.forename: M
authors.initials: M
authors.lastname: Schroder
authors.forename: J J
authors.initials: JJ
authors.lastname: Kaden
authors.forename: T
authors.initials: T
authors.lastname: Poerner
authors.forename: M
authors.initials: M
authors.lastname: Borggrefe
authors.forename: T
authors.initials: T
authors.lastname: Papavassiliu
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019412:Anatomy, Cross-Sectional / Q000379:methods*; D001024:Aortic Valve Stenosis / Q000175:diagnosis*; D006328:Cardiac Catheterization; D015150:Echocardiography, Doppler / Q000379:methods*; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D012720:Severity of Illness Index; D013382:Subtraction Technique