Pulsatile FlowBlood Flow VelocityModels, CardiovascularReplica TechniquesRegional Blood FlowRheologyHemorheologyStress, MechanicalModels, AnatomicShear StrengthEquipment DesignPericytesFlow CytometryUltrasonography, Doppler, ColorVeinsPhantoms, ImagingPulmonary CirculationHeart-Assist DevicesEchocardiography, Doppler, ColorCoronary CirculationBlood PressureHemodynamicsPressureBlood Vessel ProsthesisBlood VesselsPerfusionFemoral ArteryCarotid ArteriesHeart Valve ProsthesisIntracranial AneurysmArteriesEndothelium, VascularMaterials TestingTime FactorsComputer SimulationBiomechanical PhenomenaProsthesis DesignNitric Oxide Synthase Type IIIDogsModels, BiologicalAortaSwineReproducibility of ResultsCoronary VesselsGene FlowCells, CulturedCattleCerebrovascular Circulation