A　Blalock-Taussig　Shunt　is　a　surgically　created　connection　inserted　between　the　systemic　and　pulmonary　circulations　to　control　pulmonary　blood　flow　during　surgical　reconstruction　of　the　univentricular　heart.　The　hemodynamic　effect　of　these　shunts　in　the　postoperative　setting　has　not　been　well　characterized　because　of　the　difficulties　in　making　accurate　measurements.　In　this　study　a　group　of　three-dimensional　computational　models　of　the　shunt　have　been　investigated　under　steady-state　conditions　by　means　of　CFD　analysis.　The　model　is　used　to　quantify　the　effects　of　shunt　diameter,　curvature,　and　angle　on　the　pressure-flow　relationship　of　the　different　shunt　structure　(straight　and　curved　shunts,　respectively).　The　close　correlation　between　predicted　and　observed　data　supports　the　use　of　mathematic　modeling　in　the　design　and　assessment　of　surgical　procedures.　The　potentially　damaging　effects　of　a　systemic　ventriculotomy　in　the　Blalock-Taussig　Shunt　modification　of　the　Norwood　operation　have　not　been　analyzed.　©　2011　IEEE.