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Simulated flow speed in a plane bisecting the assisted bidirectional Glenn (ABG) shunt and the superior vena cava (SVC). Shunt flow is right to left. Shunts have nozzle diameters of (A) 0.6 mm, (B) 1.2 mm, and (C) 1.8 mm. (D) Pulmonary flow versus SVC pressure in the ABG, varying nozzle diameters. Arrows compare the same anatomic models at different pulmonary vascular resistance (PVR). (BDG = bidirectional Glenn.)
