PericardiumRegional Blood FlowEndocardiumBlood Flow VelocityDogsCoronary CirculationHeart VentriclesMyocardiumHeartCerebrovascular CirculationHeart AneurysmCoronary VesselsHemodynamicsCoturnixArteriolesBlood PressureLaser-Doppler FlowmetryVoltage-Sensitive Dye ImagingModels, CardiovascularVentricular FunctionVasodilationCadmium ChlorideMyocardial ContractionVentricular Function, LeftAction PotentialsHeart Conduction SystemFlow CytometryTime FactorsSwineHeart RateVascular ResistanceHeart SeptumPulsatile FlowXenon RadioisotopesElectrocardiographyMyocardial IschemiaMicrospheresCardiomyopathiesCardiomegalyMyocardial InfarctionCoronary DiseasePurkinje FibersMicrocirculationCardiac Pacing, ArtificialTachycardia, VentricularRenal CirculationOxygenLiver CirculationOxygen ConsumptionVentricular Dysfunction, LeftDisease Models, AnimalPulmonary CirculationTomography, Emission-ComputedEchocardiographyRheologySplanchnic CirculationCarbon DioxideHyperemiaOxygen RadioisotopesChick EmbryoBrainUltrasonography, DopplerMyocytes, CardiacXenonGene FlowStroke VolumeBlood Circulation TimeUltrasonography, Doppler, ColorBlood VolumePlethysmographyVasodilator AgentsMesodermCollateral CirculationCerebral ArteriesArteriesCell SeparationElectrophysiologyVasoconstrictionPatch-Clamp TechniquesUltrasonography, Doppler, TranscranialCapillariesNitric OxideHindlimbPartial PressureIschemiaBlood Gas AnalysisLegMiddle Cerebral ArteryRetinal VesselsCalciumAntipyrinePerfusionMuscle, SkeletalChoroidSkin TemperatureVasomotor SystemFemoral ArteryBrain IschemiaSkinAdenosine