Pulmonary CirculationPulmonary ArteryLungPulmonary Gas ExchangeGravitationVentilation-Perfusion RatioHypertension, PulmonaryHeart Bypass, RightSheepPulmonary AtresiaHeart Defects, CongenitalTechnetium Tc 99m Aggregated AlbuminNoble GasesVascular ResistanceMicrospheresFractalsProne PositionHeart Septal Defects, VentricularHLA-DR6 AntigenHemodynamicsPulmonary VeinsOxygenatorsFontan ProcedureRegional Blood FlowAnoxiaExtravascular Lung WaterBlood Gas AnalysisKrypton RadioisotopesBlood Flow VelocityHypoplastic Left Heart SyndromeCardiac OutputOxygenPulmonary EdemaPulmonary Diffusing CapacityCapillary ResistanceDogsSupine PositionBronchial ArteriesAortic Arch SyndromesPulmonary Valve StenosisGravity SuitsArteriovenous Shunt, SurgicalPartial PressureBlood PressureLung Volume MeasurementsRespirationFetusRespiration, ArtificialCarbon DioxideVena Cava, SuperiorSheep, DomesticPulmonary VentilationBlood VolumeBronchopulmonary SequestrationCardiac CatheterizationPulmonary Wedge PressureNitric OxideLiquid VentilationCyanosisVasoconstrictionTurtlesPulmonary AlveoliLung InjuryEndothelin-1Ductus ArteriosusHead-Down TiltRespiratory Dead SpaceDuctus Arteriosus, PatentPulmonary ValvePyrrolizidine AlkaloidsMonocrotalineAdministration, InhalationHydrogen SulfideGallium RadioisotopesPostureNitric Oxide SynthaseEchocardiography, DopplerPositive-Pressure RespirationIndicator Dilution TechniquesAnimals, NewbornInfant, NewbornNitric Oxide Synthase Type IIIRespiratory Function TestsSwine, MiniatureThermodilutionHeart Septal Defects, AtrialTetralogy of FallotRespiratory MechanicsRestTricuspid ValveOxygen ConsumptionModels, CardiovascularAnastomosis, SurgicalFluorocarbonsSwineAngiographyPostoperative PeriodHeart RateDisease Models, AnimalHeart Atria