I took Willem in for an echocardiogram at Doernbecher's this morning. In the months since his last one, the leak in his aortic valve has gone from "mild to moderate" to merely "mild." This is a big improvement! It's possible that he may "outgrow" the leak at some point without the need for any further treatment. Other than that, his heart is really healthy, and he will have no aerobic restrictions on his future activities. Just no football or power lifting.
Here are the boys enjoying the gentler sport of indoor stuffed animal picnicking: