Pulmonary CirculationPulmonary ArteryHypertension, PulmonaryBlood CirculationLungAnoxiaVascular ResistanceDuctus ArteriosusPulmonary Heart DiseaseHemodynamicsVasoconstrictionPulmonary VeinsHypertrophy, Right VentricularAtrial PressureBlood PressureNitric OxideCapillary ResistanceCardiac OutputSheepVentricular Function, RightPersistent Fetal Circulation SyndromeAnatomy, RegionalPulmonary Gas ExchangeDogsVasodilationPerfusionPulmonary Wedge PressureVasodilator AgentsModels, CardiovascularExtracorporeal CirculationBlood Flow VelocityPulmonary EdemaCardiac CatheterizationBronchial Arteries15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidOsteoarthropathy, Secondary HypertrophicPhysiologyFetusRegional Blood FlowVentricular Dysfunction, RightAdministration, InhalationVenous PressureEndothelin-1OxygenTime FactorsSynchrotronsCardiography, ImpedanceRespirationPulsatile FlowMonocrotalineCapillariesVasoconstrictor AgentsEndothelium, VascularAnimals, NewbornPulmonary Valve StenosisPulmonary AlveoliPulmonary EmbolismRats, Sprague-DawleyNitric Oxide SynthaseProstaglandin Endoperoxides, SyntheticAdrenomedullinDuctus Arteriosus, PatentNitroarginineCollateral CirculationHeart Defects, CongenitalChronic DiseaseEndothelinsMuscle, Smooth, VascularHeart VentriclesMicrocirculationEpoprostenolNitric Oxide Synthase Type IIIBlood VesselsCyclic GMPAngiographyArteriovenous FistulaLung DiseasesHeartBlood Gas AnalysisSwinePregnancyInfant, NewbornBlood VolumeReceptors, EndothelinHeart RateNitroprussideDose-Response Relationship, DrugCoronary CirculationPressureEnterohepatic CirculationRabbitsHematocritCerebrovascular CirculationAtrial Natriuretic FactorDisease Models, AnimalProstaglandinsRats, WistarEchocardiography, DopplerNG-Nitroarginine Methyl EsterEndothelial Cells