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Transesophageal echocardiography showing septal malalignment. The septum primum attached to the aorta is malaligned toward the left atrial side (solid arrow). The septum primum is separated from the septum secundum (dotted arrow). The defect surface of the septum primum (solid line) is different from that of the septum secundum (dotted line). The distance of separation between the septum primum and the septum secundum is measured (double arrow).
