Electric ConductivityMembrane PotentialsElectrophysiologyAction PotentialsIon ChannelsRegional Blood FlowElectrodesElectric StimulationBlood Flow VelocityPotassiumMathematicsMicroelectrodesIntercellular JunctionsFlow CytometryElectric ImpedanceBariumIon Channel GatingModels, CardiovascularModels, NeurologicalSodiumModels, BiologicalAxonsHeartNeural ConductionExtracellular SpaceCalciumTime FactorsBiophysicsComputer SimulationPatch-Clamp TechniquesNeuronsGuinea PigsCalcium ChannelsPulsatile FlowSynaptic TransmissionGene FlowCell MembraneKineticsCerebrovascular CirculationCoronary CirculationRheologyOptic FlowLaser-Doppler FlowmetryFlow Injection AnalysisPeak Expiratory Flow RateVascular ResistanceBlood PressureMicrospheresBlood CirculationHemorheologyMicrocirculationHydrodynamicsUltrasonography, Doppler, ColorXenon RadioisotopesPulmonary CirculationUltrasonography, DopplerCollateral CirculationLiver CirculationStress, MechanicalOxygenPerfusionCardiac OutputRenal CirculationVasodilationOxygen ConsumptionCoronary VesselsCarbon DioxideArteriesPressureReproducibility of ResultsHeart RateBlood VolumeTomography, Emission-ComputedSplanchnic CirculationVasodilator AgentsWater MovementsBrainMicrofluidicsEquipment DesignShear StrengthEndothelium, VascularOxygen RadioisotopesMaximal Expiratory Flow RateSensitivity and SpecificityCerebral ArteriesPlethysmographyUltrasonography, Doppler, TranscranialEchocardiography, DopplerNitric OxideCapillariesReference ValuesMicrofluidic Analytical TechniquesXenonSwineAdenosineSheepVasoconstrictionBlood Circulation TimeAir MovementsCells, Cultured