Video 15.2 Subxiphoid left anterior oblique view demonstrating a large ostium primum atrial septal defect
Subxiphoid left anterior oblique view demonstrating a large ostium primum atrial septal defect. Note that the right pulmonary artery posterior to the superior vena cava is dilated from the atrial level left-to-right shunt. At the end of the clip, there is acceleration of flow across the pulmonary valve likely from the large atrial level left-to-right shunt.