Figure 3 . 2D ICE images from the initial “home view” (A) during clockwise rotation to the interatrial septum (online video), 2D and 3D images of the interatrial septum focused on the fossa ovalis (B), and 2D and 3D images of a prominent moderator band in the right ventricle (C).
IAS – Interatrial septum
MB – Moderator band
Figure 4 . Images obtained during transseptal catheterization showing the transseptal needle tenting the fossa ovalis in 2D and 3D (A), the sheath across the septum (B), the sheath across the septum inferior to an atrial septal defect occluder device in 2D (C), and the sheath across the septum inferior to an atrial septal defect occluder device in 3D (D).