Figure 6.

Virtual dissection of a superior sinus venosus interatrial communication in left anterior oblique projection (Panel A) and as viewed from the superior direction (Panel B). Panel A shows extraseptal location of the defect with anomalous connection of right superior pulmonary vein (red arrow) having retained connection to the left atrium. The right inferior pulmonary vein (yellow arrow) and left pulmonary veins connect normally to the left atrium. Panel B shows overriding of the superior caval vein on the atrial septum (*) when viewed from above. LA—left atrium; LPV—left pulmonary veins; PA—pulmonary artery; RA—right atrium.