The　modified　Blalock-Taussig　(BT)　shunt　is　a　palliative　surgery　which　can　help　the　tetralogy　of　Fallot　(TOF)　patient　increase　the　blood　oxygen　saturation　by　interposing　a　systemic-to-pulmonary　artery　shunt.　Two　typical　anastomotic　shapes　are　frequently　used　in　clinical　practice:　the　end-to-side　(ETS)　and　the　side-to-side　(STS)　anastomosis.　This　paper　examines　the　hemodynamic　influence　of　the　anastomotic　shape　in　the　modified　BT　shunt.　Three　models　with　different　anastomotic　shapes　were　reconstructed.　The　ETS　anastomoses　were　applied　in　the　first　model.　For　the　innominate　artery　(IA)　and　the　pulmonary　artery　(PA)　in　the　second　model,　the　ETS　and　the　STS　anastomosis　were　applied,　respectively.　Finally,　the　STS　anastomoses　were　applied　in　the　third　model.　The　0D/3D　coupling　method　was　used　to　perform　a　numerical　simulation　by　coupling　the　three-dimensional　(3D)　artery　model　with　a　zero-dimensional　(0D)　lumped　parameter　model　for　the　cardiovascular　system.　The　simulation　results　showed　that　the　perfusion　into　the　left　and　right　PA　in　Model　1　was　unbalanced.　Swirling　flow　appeared　in　the　shunt　in　Model　3,　but　the　shunt　flow　rate　in　Model　3　was　lower.　The　ETS　anastomosis　at　the　PA　may　cause　unbalanced　blood　perfusion　into　the　left　and　right　PA.　Conversely,　the　STS　anastomosis　can　make　the　blood　perfusion　more　balanced.　Otherwise,the　STS　anastomosis　at　the　IA　could　generate　a　swirling　flow　in　the　shunt　which　may　provide　a　better　hemodynamic　environment　while　decreasing　the　pulmonary　perfusion.