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Figure 1 Parasternal real-time three-dimensional echocardiography (RT-3D) acquisition. (A) The elevational plane was steered right-to-left across the reference long-axis view (LAX) to obtain corresponding short-axis views (SAX). (B) Reference long-axis image with corresponding short-axis images obtained at the basal, mid- and apical levels by steering the elevational plane (white line).