Pulmonary CirculationLungPulmonary ArteryHypertension, PulmonaryBlood CirculationAnoxiaVascular ResistanceLung DiseasesDuctus ArteriosusPulmonary Heart DiseaseHemodynamicsVasoconstrictionPulmonary VeinsLung NeoplasmsHypertrophy, Right VentricularAtrial PressureBlood PressureNitric OxideSheepPulmonary Gas ExchangeCapillary ResistanceCardiac OutputVentricular Function, RightPersistent Fetal Circulation SyndromeAnatomy, RegionalPulmonary EdemaLung InjuryDogsVasodilationPerfusionPulmonary AlveoliCarcinoma, Non-Small-Cell LungPulmonary Wedge PressureVasodilator AgentsExtracorporeal CirculationLung TransplantationModels, CardiovascularAdministration, InhalationBronchial ArteriesFetusBlood Flow VelocityCardiac Catheterization15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidPhysiologyOsteoarthropathy, Secondary HypertrophicOxygenVentricular Dysfunction, RightRegional Blood FlowRespirationVenous PressureAcute Lung InjuryEndothelin-1SynchrotronsCardiography, ImpedanceAnimals, NewbornCapillariesMonocrotalinePulsatile FlowPulmonary EmbolismPulmonary Valve StenosisEndothelium, VascularVasoconstrictor AgentsRats, Sprague-DawleyNitric Oxide SynthaseDuctus Arteriosus, PatentProstaglandin Endoperoxides, SyntheticChronic DiseaseAdrenomedullinHeart Defects, CongenitalNitroarginineBlood Gas AnalysisCollateral CirculationEndothelinsMicrocirculationNitric Oxide Synthase Type IIIInfant, NewbornBlood VesselsEpoprostenolMuscle, Smooth, VascularSwinePregnancyHeart VentriclesArteriovenous FistulaTime FactorsAngiographyLung Volume MeasurementsBronchiBlood VolumePressureReceptors, EndothelinCyclic GMPHeartRabbitsCapillary PermeabilityEnterohepatic CirculationDose-Response Relationship, DrugNitroprussideHeart RateHematocritMice, Inbred C57BL