5a and 5b. TEE images 3 and 4 of the second patient. The TEE image of the same patient at 50° revealing a small ostium secundum atrial defect (white arrow) in addition to the ASD type ostium primum (green arrow). Mitral regurgitation is depicted by the yellow arrow (Figure 5b). LA – Left Atrium; RA – Right Atrium; LV – Left Ventricle; RV – Right Ventricle.