Sensitive to Noise
Many children with Williams syndrome are very sensitive to noise. Certain sounds can be painful and extremely frightening to the child. Often protects the child’s ears off for specific sounds. Sometimes the child is fearful or aggressive ambient noise which it has no influence. This is less as the child grows older, but quite often it does not disappear.

Narrowing of heart-lung or kidney Barrels
Many children with Williams syndrome have a narrowing of heart vessels, pulmonary vascular and / or renal vessels. The strictures are usually discovered when the child, because a hartruisje, a child is referred for cardiac investigation. The severity of the constriction (s) per child varies greatly. The constrictions can grow with the increase or decrease. Usually it is sufficient child regularly checked. Sometimes the narrowing is so severe that a surgical correction is necessary.