A graft useable with a blood flow device that allows the use of a single blood flow device to simultaneously provide blood flow to the systemic and pulmonary circulations. The graft has a tubular inlet portion coupleable to the outlet of the blood-flow assist device and configured to receive blood flow therethrough. A tubular systemic portion is connected to the inlet portion and configured to be connected to the systemic circulation of the patient to direct the first portion of the blood flow into the systemic circulation at a first flow rate. The graft has a tubular pulmonary portion connected to the inlet portion and configured to be connected to the pulmonary circulation of the patient to direct a second portion of the blood flow into the pulmonary circulation substantially simultaneous with delivery of the first portion of the blood flow into the systemic circulation.
