<p>We present the case of a 16-month-old patient with tricuspid atresia and absent pulmonary valve who underwent staged single ventricle palliation, ultimately to a unidirectional superior cavopulmonary anastomosis (Glenn) to the right pulmonary artery and a central shunt to a hypoplastic left pulmonary artery. The pulmonary arteries were septated with a thin patch of Gore-Tex at that surgery in anticipation of a transcatheter superior cavopulmonary shunt completion at a later date. She returned to the cardiac catheterization laboratory about 12&#xa0;months later and underwent uncomplicated shunt completion. There are no other reports of transcatheter superior cavopulmonary anastomosis shunt completion in a pediatric patient in the literature.</p>