A 3-week-old female underwent transthoracic echocardiography (iE33, Philips medical system, Andover, MA, USA) to evaluate a grade 1 systolic murmur. In the subcostal view, blood flow in the inferior vena cava drained to the right atrium, while no blood flow from the superior vena cava to the right atrium was noted (Figure 1A). In the four-chamber view, no superior vena caval blood flow was seen...
