Pulsatile FlowBlood Flow VelocityModels, CardiovascularRegional Blood FlowReplica TechniquesRheologyHemorheologyStress, MechanicalModels, AnatomicEquipment DesignShear StrengthReproducibility of ResultsPhantoms, ImagingUltrasonography, Doppler, ColorFlow CytometryPericytesVeinsPulmonary CirculationBlood PressureHeart-Assist DevicesEchocardiography, Doppler, ColorPressureHemodynamicsCoronary CirculationTime FactorsBlood Vessel ProsthesisBlood VesselsCarotid ArteriesFemoral ArteryPerfusionArteriesMaterials TestingHeart Valve ProsthesisComputer SimulationIntracranial AneurysmEndothelium, VascularBiomechanical PhenomenaSwineModels, BiologicalDogsProsthesis DesignCoronary VesselsAortaNitric Oxide Synthase Type IIIGene FlowCattleCells, CulturedSensitivity and SpecificityCerebrovascular CirculationReference ValuesObserver VariationCalibration