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Figure 3 2- and 3-Dimensional Echocardiographic Views During Transseptal Puncture

(A) 2-dimensional transesophageal echocardiographic imaging depicts tenting (arrow) of the atrial septum into the left atrium (LA). (B) 3-dimensional transesophageal echocardiographic imaging visualizes tenting (arrow) of the atrial septum. RA = right atrium.