Pulmonary CirculationPulmonary ArteryHypertension, PulmonaryBlood CirculationLungCardiac OutputVascular ResistanceAnoxiaDuctus ArteriosusMyocytes, CardiacHemodynamicsPulmonary Heart DiseaseVasoconstrictionHeartBlood PressurePulmonary VeinsHypertrophy, Right VentricularCardiac CatheterizationAtrial PressureDogsNitric OxideSheepVentricular Function, RightModels, CardiovascularCapillary ResistanceCardiac Surgical ProceduresPersistent Fetal Circulation SyndromePulmonary Gas ExchangeAnatomy, RegionalPerfusionHeart VentriclesArrhythmias, CardiacVasodilationPulmonary Wedge PressureVasodilator AgentsExtracorporeal CirculationDeath, Sudden, CardiacBlood Flow VelocityTime FactorsHeart Defects, CongenitalPulmonary EdemaBronchial ArteriesVentricular Dysfunction, RightRegional Blood FlowHeart RatePhysiology15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidFetusCardiography, ImpedanceOsteoarthropathy, Secondary HypertrophicAnimals, NewbornEndothelin-1OxygenRats, Sprague-DawleyAdministration, InhalationRespirationVenous PressureHeart FailurePulsatile FlowSynchrotronsPulmonary Valve StenosisCapillariesHeart ArrestVasoconstrictor AgentsEchocardiographyMonocrotalineEndothelium, VascularCardiomegalyPulmonary EmbolismCardiac Pacing, ArtificialCardiac TamponadeNitric Oxide SynthaseHeart DiseasesChronic DiseaseMyocardiumPulmonary AlveoliAdrenomedullinAtrial Natriuretic FactorDuctus Arteriosus, PatentCoronary CirculationDisease Models, AnimalProstaglandin Endoperoxides, SyntheticMyocardial ContractionInfant, NewbornCollateral CirculationBlood VolumeEndothelinsSwineNitroarginineNitric Oxide Synthase Type IIIRabbitsEchocardiography, DopplerMicrocirculationBlood Gas AnalysisBlood VesselsPregnancyArteriovenous FistulaMuscle, Smooth, VascularEpoprostenolAngiography