Pulmonary CirculationPulmonary ArteryHypertension, PulmonaryBlood CirculationLungAnoxiaVascular ResistanceDuctus ArteriosusPulmonary Heart DiseaseHemodynamicsVasoconstrictionPulmonary VeinsHypertrophy, Right VentricularAtrial PressureBlood PressureNitric OxideCapillary ResistanceSheepCardiac OutputVentricular Function, RightPersistent Fetal Circulation SyndromeAnatomy, RegionalPulmonary Gas ExchangeVasodilationDogsPerfusionPulmonary Wedge PressureVasodilator AgentsExtracorporeal CirculationModels, CardiovascularBronchial ArteriesBlood Flow VelocityPulmonary EdemaCardiac CatheterizationPhysiology15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidOsteoarthropathy, Secondary HypertrophicFetusVentricular Dysfunction, RightRegional Blood FlowAdministration, InhalationVenous PressureSynchrotronsOxygenEndothelin-1Cardiography, ImpedanceRespirationPulsatile FlowMonocrotalinePulmonary Valve StenosisCapillariesVasoconstrictor AgentsPulmonary AlveoliTime FactorsAnimals, NewbornPulmonary EmbolismEndothelium, VascularDuctus Arteriosus, PatentProstaglandin Endoperoxides, SyntheticAdrenomedullinHeart Defects, CongenitalNitric Oxide SynthaseNitroarginineCollateral CirculationChronic DiseaseEndothelinsHeart VentriclesRats, Sprague-DawleyNitric Oxide Synthase Type IIIMuscle, Smooth, VascularEpoprostenolBlood VesselsMicrocirculationArteriovenous FistulaInfant, NewbornAngiographyLung DiseasesBlood Gas AnalysisPregnancyBlood VolumeSwineReceptors, EndothelinCyclic GMPHeartEnterohepatic CirculationNitroprussidePressureHeart RateRabbitsHematocritCoronary CirculationCerebrovascular CirculationAtrial Natriuretic FactorEchocardiography, DopplerProstaglandinsDose-Response Relationship, DrugAmidesEndothelial CellsNG-Nitroarginine Methyl EsterDisease Models, Animal