and Truncus Arteriosus Type I with an unusual remote VSD. He underwent TEF repair at birth with successful re-anastomosis of distal esophagus and is now 4.2 kg at 2 months of age and scheduled for Truncus repair. After successful induction of anesthesia and invasive monitoring, the surgeon is requesting a Transesophageal probe to be placed to confirm repair of intracardiac shunt and truncal valve integrity.