Pulmonary CirculationHemodynamicsPulmonary ArteryHypertension, PulmonaryVascular ResistanceBlood CirculationLungAnoxiaDuctus ArteriosusPulmonary Heart DiseaseBlood PressureVasoconstrictionCardiac OutputHypertrophy, Right VentricularBlood Flow VelocityPulmonary VeinsAtrial PressureDogsNitric OxideRegional Blood FlowModels, CardiovascularSheepVentricular Function, RightPulmonary Gas ExchangePulmonary Wedge PressureVasodilationCapillary ResistanceVasodilator AgentsPersistent Fetal Circulation SyndromeAnatomy, RegionalPerfusionCardiac CatheterizationPulsatile FlowExtracorporeal CirculationCardiography, ImpedancePulmonary EdemaOxygenVenous PressureCerebrovascular CirculationRenal CirculationBronchial Arteries15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidVentricular Dysfunction, RightBlood VolumeFetusAdministration, InhalationEndothelin-1PhysiologyOsteoarthropathy, Secondary HypertrophicHeart RateCapillariesRespirationVasoconstrictor AgentsTime FactorsMicrocirculationMonocrotalineBlood Gas AnalysisCoronary CirculationSynchrotronsRats, Sprague-DawleyNitric Oxide SynthaseHeart Defects, CongenitalEndothelium, VascularAnimals, NewbornHeart VentriclesCollateral CirculationEpoprostenolPulmonary EmbolismChronic DiseaseSwineHeartPulmonary AlveoliPulmonary Valve StenosisAdrenomedullinEndothelinsHematocritNitroarginineReceptors, EndothelinSplanchnic CirculationAngiographyBlood VesselsLiver CirculationNitric Oxide Synthase Type IIIDuctus Arteriosus, PatentProstaglandin Endoperoxides, SyntheticArteriovenous FistulaPressureMuscle, Smooth, VascularAtrial Natriuretic FactorDisease Models, AnimalPregnancyOxygen ConsumptionInfant, NewbornEchocardiography, DopplerNitroprussideLung DiseasesCyclic GMPProstaglandinsDose-Response Relationship, DrugRabbits