Josiah's heart cath is scheduled for tomorrow morning. He is the first case, so he will be taken to the cath lab around 8am. The procedure will be around 4- 5 hours long. While this isn't surgery it is still a very invasive procedure as they are sending wires and tubing directly into his heart. The goal of this cath is to determine where Josiah is in regards to becoming a candidate for his next open heart surgery, the Glenn. Josiah has already passed the normal age range for this surgery but his lungs have proven to be a complication in him becoming a candidate for this surgery. So tomorrow they will take measurements and check on the pressures in both his heart and lungs. They will also be able to get a good glimpse of Josiah's heart function. The other main thing they will be doing is determining if there is in fact a coarctation (or narrowing) of his aorta. The Md's think that they are seeing one by echo and so if there is a coarctation they will have to balloon it open.