Dear Haad,
Without evaluating your son, I cannot say exactly what you should do. Certainly perimembranous VSDs are at risk for aortic valve prolapse and valvular insufficiency. Considering that the leak is trivial, this can probably be observed at the present time. If there is also tissue growth from the right ventricle, then it is possible that the defect will close from there and not further involve the aortic valve. It may not be worthwhile to push forward to close the VSD unless you get at least moderate aortic regurgitation.
thank uoy alot doctor for your helpfull information