Before revision:  The results show that a suitable cavopulmonary assist device could increase cardiac index by 5-45 \% and decrease the IVC pressure by 5-70 \% depending on the patient's pre-support hemodynamic state and surgical configuration of the cavopulmonary assist device (IVC or full support).
After revision:  Results show that IVC support can produce beneficial hemodynamics in only a small fraction of failing Fontan scenarios. Cavopulmonary assist device could increase cardiac index by 5-45 \% and decrease the IVC pressure by 5-70 \% depending on the patient's pre-support hemodynamic state and surgical configuration of the cavopulmonary assist device (IVC or full support).