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Uppu. Vessel Plus 2021;6:21 https://dx.doi.org/10.20517/2574-1209.2021.101 Page 3 of 19
Figure 1. Image showing ostium secundum atrial septal defect as a defect within the fossa ovalis.
Figure 2. Still image from a trans-thoracic echocardiogram in parasternal short-axis view in a teenager showing a large ostium
secundum atrial septal defect with deficient retroaortic rim (yellow arrow). RA: Right atrium; LA: left atrium.
communication defects. SVDs result from incomplete incorporation of the right horn of sinus venosus into
the right atrium (RA) along with abnormal septum secundum formation. As a result, commonly, there is
