A hybrid approach for quantification of aortic valve stenosis using cardiac magnetic resonance imaging and echocardiography: comparison to right heart catheterization and standard echocardiography.
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.
Haghi
D
D
I. Medizinische Klinik, Universitätsklinikum Mannheim, 68167, Mannheim, Germany. dariush-haghi@med.ma.uni-heidelberg.de
Suselbeck
T
T
Fluechter
S
S
Kalmar
G
G
Schroder
M
M
Kaden
J J
JJ
Poerner
T
T
Borggrefe
M
M
Papavassiliu
T
T
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