Replacement of obstructed right ventricular-pulmonary arterial valved conduits with nonvalved conduits in children.

Six to thirty percent of right ventricular-to-pulmonary arterial (RV-PA) valved conduits in children fail within 5 years. Experience with correction of tetralogy of Fallot has shown that a competent pulmonary valve is not essential for excellent late results in most patients. Between March 1980 and November 1984, 26 patients who were 12.5 +/- 3.3 years old underwent conduit replacement 6.7 +/- 2.4 years after definitive repair of congenital...