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Three-dimensional (3D) echocardiographic assessment of the right atrium (RA) (A) and left atrium (LA) (B). From the apical view, both transversal and longitudinal visualization of atrial volume changes during the cardiac cycle was obtained, with endocardial contouring and cast reconstruction. 2ch, two-chamber view; 4ch, four-chamber view; SAX, short-axis view.
