A previously heathy 9-month-old infant was referred to the Pediatric Cardiology Clinic for a newly recognized heart murmur. On physical exam, she was a well-nourished, happy looking, playful child with normal growth and developmental milestones. A grade 2/6 continuous murmur was auscultated along the right sternal border which radiated to the entire precordium but not posteriorly. The murmur persisted despite neck motion and positional changes. There were no other pertinent physical examination findings. Her electrocardiogram is shown.

An echocardiogram clip is shown (Video 1).