Pulmonary CirculationPulmonary ArteryHypertension, PulmonaryBlood CirculationLungVascular ResistanceAnoxiaDuctus ArteriosusPulmonary Heart DiseaseVasoconstrictionHemodynamicsPulmonary VeinsHypertrophy, Right VentricularBlood PressureAtrial PressureNitric OxideBlood VesselsVasodilationSheepCardiac OutputCapillary ResistancePersistent Fetal Circulation SyndromeVentricular Function, RightPerfusionAnatomy, RegionalDogsPulmonary Gas ExchangeVasodilator AgentsEndothelium, VascularRegional Blood FlowModels, CardiovascularPulmonary Wedge PressureBlood Flow VelocityBronchial ArteriesExtracorporeal CirculationCapillaries15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidPulmonary EdemaFetusCardiac CatheterizationOxygenPhysiologyOsteoarthropathy, Secondary HypertrophicEndothelin-1Vasoconstrictor AgentsVentricular Dysfunction, RightAdministration, InhalationEndothelial CellsVenous PressureMuscle, Smooth, VascularMicrocirculationSynchrotronsPulsatile FlowAnimals, NewbornCardiography, ImpedanceRespirationMonocrotalineNitric Oxide SynthaseRats, Sprague-DawleyPulmonary AlveoliPulmonary Valve StenosisPulmonary EmbolismTime FactorsNitric Oxide Synthase Type IIIAdrenomedullinNitroarginineEndothelinsProstaglandin Endoperoxides, SyntheticAngiographyHeart Defects, CongenitalCollateral CirculationDuctus Arteriosus, PatentChronic DiseaseEpoprostenolBlood VolumePregnancyNitroprussideHeartReceptors, EndothelinHeart VentriclesCerebrovascular CirculationCapillary PermeabilityArteriovenous FistulaSwineDisease Models, AnimalInfant, NewbornLung DiseasesBlood Gas AnalysisCyclic GMPCoronary CirculationRabbitsNeovascularization, PathologicDose-Response Relationship, DrugHeart RateAortaPlacental CirculationRetinal VesselsPressureNG-Nitroarginine Methyl EsterSplanchnic Circulation