Dear Tam,
Based on the echo report information that you have listed, it appears that he has mild residual stenosis of the aortic valve, which does not cause a problem. That said, I tell all of my patients that aortic valve disease is something that you have for life in one way, shape, or form. This valvuloplasty will not last him his whole life, as it will wear out and/or have an inflammatory response from the body that will make the valve leaky, more stenotic, or both. It was done to get rid of the severe aortic valve regurgitation that can accompany a bicuspid aortic valve. Although I cannot say for sure without evaluating him, it sounds like he had a reasonable repair with only limited obstruction and trivial residual leakage at the valve. Please note that bicuspid aortic valves can become more stenotic and/or regurgitant over time, as well as having progressive aortic dilation. Therefore, your son will need lifelong follow-up for his valve.
The repair was to correct severe regurgitation due to a bicuspid valve. He had already had balloon procedure done at 8months for the moderate stenosis. He had pre surgery mild thickening of the ventricle wall and no other outward symptoms.