Nina Ajmone Marsan et al. JIMG 2009;2:

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Nina Ajmone Marsan et al. JIMG 2009;2:1245-1252 Real-Time 3D Echocardiographic Technique for Assessment of Vena Contracta Area (EROA-3D) The 3-dimensional (3D) dataset is manually cropped by an image plane perpendicularly oriented to the jet direction up to the narrowest cross-sectional area of the jet. Effective regurgitant orifice area (EROA)-3D is measured by manual planimetry of the color Doppler signal tilting the image in an “en face” view. (A) Example of a patient with moderate functional mitral regurgitation (MR) and asymmetric EROA-3D (= 0.23 cm2) elongated along the leaflet coaptation line. (B) Example of a patient with severe functional MR and extremely irregular EROA-3D (= 0.48 cm2), for which geometric assumptions might not be applicable. Nina Ajmone Marsan et al. JIMG 2009;2:1245-1252 American College of Cardiology Foundation