简介：Theconventionalbypassdesignistoimplantagraftonthestenosedhostarteryallowingbloodtoflowbypassthestenoticartery.However,restenosisisachallengingproblemwhichfinallyresultsinreoperation.Thepurposeofthispaperistoproposeanewbypassgraftdesignofcoronaryarterywithanassistantgraftforthetreatmentofcoronaryarterystenosis.AnadditionalassistantgraftwasemployedinthenewdesigncomparedwiththeconventionalETSanastomosis.Numericalsimulationswereperformedbymeansoffinitevolumemethodusingcomputationalfluiddynamics(CFD)solver.ResultsdemonstratedthatthenewanastomosesmodelprovidedamoresmoothflowatthedistalETSanastomosiswithoutanystagnationpointonanastomoticbedandvortexformationintheheelregion.Oscillatoryshearindex(OSI)andtime-averagedwallshearstressgradient(TAWSSG)atthearterybedofthedistalETSanastomosiswerereduced.Thecoronaryarterybypassgraftwithanassistantgraftisfeasibletoimprovethelocalhemodynamicsanddiminishtheprobabilityofrestenosisinthetreatmentofcoronaryarterystenosis.