Pulmonary CirculationBlood CirculationPulmonary ArteryArteriesVeinsAngiographyJugular VeinsRegional Blood FlowFemoral VeinHemodynamicsCoronary AngiographyMagnetic Resonance AngiographyBlood PressureCerebral AngiographyDogsHypertension, PulmonaryAngiography, Digital SubtractionLungVascular ResistanceAnoxiaDuctus ArteriosusPulmonary Heart DiseaseFluorescein AngiographyExtracorporeal CirculationVasoconstrictionPulmonary VeinsTomography, X-Ray ComputedCollateral CirculationHypertrophy, Right VentricularAtrial PressureContrast MediaBlood Flow VelocityNitric OxideCardiac OutputCardiac CatheterizationSheepCapillary ResistanceVasodilationCoronary CirculationVasodilator AgentsPersistent Fetal Circulation SyndromeVentricular Function, RightPerfusionAnatomy, RegionalCerebrovascular CirculationIntracranial AneurysmModels, CardiovascularBronchial ArteriesPulmonary Gas ExchangeTime FactorsPulmonary Wedge PressureArteriovenous FistulaRadionuclide AngiographyEnterohepatic CirculationPulmonary EmbolismFetusPulmonary EdemaSensitivity and SpecificityPhysiologyVentricular Dysfunction, RightCoronary Artery Disease15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidSynchrotronsPulsatile FlowOxygenVenous PressureTreatment OutcomeOsteoarthropathy, Secondary HypertrophicImaging, Three-DimensionalCoronary StenosisAdministration, InhalationCapillariesEmbolization, TherapeuticEndothelium, VascularEndothelin-1RespirationPlacental CirculationSplanchnic CirculationPulmonary Valve StenosisTomography, Spiral ComputedCoronary VesselsMicrocirculationVasoconstrictor AgentsCardiography, ImpedanceHeart Defects, CongenitalVertebral ArteryCarotid Artery, InternalVertebrobasilar InsufficiencyBlood VesselsHeart VentriclesPredictive Value of TestsHeartIntracranial Arteriovenous MalformationsLiver CirculationMonocrotalineAnimals, NewbornBlood Circulation TimeDuctus Arteriosus, PatentPulmonary AlveoliSwine