Pulmonary CirculationPulmonary ArteryComplianceHypertension, PulmonaryBlood CirculationLungPatient ComplianceVascular ResistanceAnoxiaDuctus ArteriosusPulmonary Heart DiseaseLung ComplianceHemodynamicsVasoconstrictionPulmonary VeinsHypertrophy, Right VentricularBlood PressureAtrial PressureNitric OxideCapillary ResistanceSheepCardiac OutputVentricular Function, RightPulmonary Gas ExchangePersistent Fetal Circulation SyndromeAnatomy, RegionalDogsVasodilationPulmonary Wedge PressureModels, CardiovascularPerfusionVasodilator AgentsExtracorporeal CirculationBlood Flow VelocityPulmonary EdemaBronchial ArteriesCardiac CatheterizationRegional Blood Flow15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidPhysiologyAdministration, InhalationOsteoarthropathy, Secondary HypertrophicFetusVentricular Dysfunction, RightVenous PressureRespirationPulsatile FlowOxygenEndothelin-1SynchrotronsCardiography, ImpedanceCapillariesTime FactorsPulmonary AlveoliMonocrotalineVasoconstrictor AgentsPulmonary Valve StenosisAnimals, NewbornEndothelium, VascularPulmonary EmbolismPressureDuctus Arteriosus, PatentChronic DiseaseProstaglandin Endoperoxides, SyntheticAdrenomedullinGuideline AdherenceNitric Oxide SynthaseHeart Defects, CongenitalInfant, NewbornNitroarginineCollateral CirculationBlood VolumeHeart VentriclesLung DiseasesBlood Gas AnalysisMuscle, Smooth, VascularBlood VesselsEndothelinsRats, Sprague-DawleyMicrocirculationNitric Oxide Synthase Type IIIEpoprostenolPregnancyArteriovenous FistulaSwineAngiographyHeartReceptors, EndothelinHeart RateCyclic GMPEnterohepatic CirculationNitroprussideCoronary CirculationRabbitsHematocritEchocardiography, DopplerCerebrovascular CirculationDose-Response Relationship, DrugAortaTreatment Outcome