Surgical treatment of congenital pulmonary stenosis due to dysplastic leaflets and small valve anulus.

Seven cases of pulmonary valve stenosis due to congenital dysplasia of the valvular apparatus have been corrected by patch-graft enlargement of the right ventricular outflow tract. The six surviving patients (85%) are now leading normal lives with good exercise tolerance. The satisfactory right ventricular performance, manifested by these subjects after the operation and in the long-term follow-up, supports the validity of the procedure in the presence of a normal right ventricle and tricuspid valve.