Figure 2

A Fontan patient where modeling, based on patient specific image data, could have predicted the surgical outcome. Surgery would not have been performed in this patient if the predicted results had been known before the intervention. The left image shows the modeled flows within the vessels delivering blood to the lungs. A y-shaped graft (dashed circle) was surgically implanted to divide the flow from the liver to both lungs. The model predicted that flow to the right lung in the inserted y-graft would be near zero (black arrows) and that surgery therefore was unsuccessful. 4D-flow on a post-operative CMR (right image, grey arrows) confirmed the vascular CFD modeling results.