Bushra S. Rana et al. JIMG 2010;3:749-760 3D TEE Image, Atrial Septum Viewed From the Left Atrium A guidewire lies through the patent foramen ovale tract and is stenting open the patent foramen ovale. Its point of opening (dotted red line) and direction (red arrow) are shown, opening into the superior and anterior aspect of the left atrium. The position of the fossa ovalis on the right atrial side is shown. MV = mitral valve; RUPV = right upper pulmonary vein; other abbreviations as in Figures 1 and 3. Bushra S. Rana et al. JIMG 2010;3:749-760 American College of Cardiology Foundation