Pulmonary CirculationPulmonary ArteryHypertension, PulmonaryBlood CirculationLungAnoxiaVascular ResistanceDuctus ArteriosusPulmonary Heart DiseaseHemodynamicsVasoconstrictionPulmonary VeinsHypertrophy, Right VentricularAtrial PressureBlood PressureNitric OxideSheepCapillary ResistanceCardiac OutputVentricular Function, RightPersistent Fetal Circulation SyndromeAnatomy, RegionalPulmonary Gas ExchangeDogsVasodilationPerfusionPulmonary Wedge PressureVasodilator AgentsModels, CardiovascularExtracorporeal CirculationBlood Flow VelocityPulmonary EdemaBronchial ArteriesCardiac Catheterization15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidFetusPhysiologyOsteoarthropathy, Secondary HypertrophicRegional Blood FlowVentricular Dysfunction, RightAdministration, InhalationOxygenVenous PressureEndothelin-1SynchrotronsCardiography, ImpedanceRespirationAnimals, NewbornPulsatile FlowTime FactorsCapillariesMonocrotalineEndothelium, VascularPulmonary Valve StenosisPulmonary AlveoliVasoconstrictor AgentsRats, Sprague-DawleyPulmonary EmbolismNitric Oxide SynthaseDuctus Arteriosus, PatentAdrenomedullinProstaglandin Endoperoxides, SyntheticHeart Defects, CongenitalChronic DiseaseNitroarginineCollateral CirculationHeart VentriclesMicrocirculationMuscle, Smooth, VascularEndothelinsNitric Oxide Synthase Type IIIPregnancyBlood VesselsEpoprostenolHeartArteriovenous FistulaLung DiseasesInfant, NewbornAngiographySwineBlood Gas AnalysisDisease Models, AnimalBlood VolumeReceptors, EndothelinCyclic GMPRabbitsHeart RateNitroprussideDose-Response Relationship, DrugEnterohepatic CirculationPressureCerebrovascular CirculationRats, WistarHematocritCoronary CirculationAtrial Natriuretic FactorProstaglandinsEchocardiography, DopplerEndothelial CellsAmides