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©2013 UpToDate ® Print Email Two-dimensional transthoracic echocardiogram (2D TTE) from the subcostal four-chamber view With the transducer in the subcostal position, a four-chamber view can be obtained. In this view, the lateral border of the left ventricle (LV) is delimited by the midlateral wall as opposed to the inferolateral wall on the apical four-chamber view. The apex of the left ventricle is rarely seen in this view and the right ventricle (RV) is usually smaller than the left. LA: left atrium; RA: right atrium.