Objective:　To　explore　the　influence　of　patch　shape　for　intraventricular　tunnel　(IVT)　construction　on　biomechanical　performance　of　the　double　outlet　right　ventricle　after　correction.　Methods:　Based　on　the　idealized　IVT　model,　a　two-dimensional　IVT　patch　was　designed.　Six　groups　of　patch　models　with　the　rhombic　long-to-short　axis　ratio　of　1:0.625,　1:0.3,　1:0.2,　1:0.15,　1:0.125,　1:0.1　were　established　according　to　the　difference　between　the　long　and　short　axis　of　the　rhombus　patch　in　the　turning　part,　and　finite　element　analysis　method　was　used　to　numerically　simulate　the　process　of　stitching,　holding　and　propping　up　the　patch　into　a　three-dimensional　(3D)　IVT　model.　Results:　The　maximum　stresses　on　suture　line　of　6　patch　models　were　mainly　concentrated　at　acute-angle　corners　of　the　rhombus.　As　rhombic　long-to-short　axis　ratio　of　the　patch　increased,　the　maximum　stress　of　the　IVT　suture　line　first　decreased　and　then　increased,　and　the　volume　showed　an　increasing　trend.　The　pressure　difference　between　two　ends　of　the　tunnel　first　decreased　and　then　increased.　The　patch　with　the　long-to-short　axis　ratio　of　1:0.15　had　a　uniform　surface　stress　distribution,　and　the　maximum　stress　on　the　suture　line　was　the　smallest.　Meanwhile　the　right　ventricular　volume　was　less　encroached　on,　and　the　pressure　difference　at　both　ends　of　the　tunnel　was　small.　Conclusions:　The　IVT　shape　can　influence　stresses　of　suture　line,　the　right　ventricle　volume　and　the　pressure　difference　of　IVT　with　non-monotonic　variations.　The　suture　effect　of　the　patch　with　the　long-to-short　axis　ratio　of　1:0.15　is　relatively　better　among　the　constructed　models.　Copyright　©　2022　by　the　Editorial　Board　of　Journal　of　Medical　Biomechanics.