Pulmonary ArteryUmbilical ArteriesUmbilical VeinsArteriesHypertension, PulmonaryPulmonary CirculationCarotid ArteriesRenal ArteryEndothelium, VascularFemoral ArteryCatheterization, Swan-GanzMesenteric ArteriesCerebral ArteriesHernia, UmbilicalBasilar ArteryPulmonary Wedge PressureMuscle, Smooth, VascularVasoconstrictionCoronary Artery BypassAnoxiaIliac ArteryFetal BloodSubclavian ArteryVertebral ArteryHemodynamicsBronchial ArteriesRadial ArteryMammary ArteriesHuman Umbilical Vein Endothelial CellsCarotid Artery, InternalCells, CulturedVasodilationCardiac CatheterizationCoronary VesselsCarotid Artery DiseasesUmbilicusPregnancyBlood PressureSplenic ArteryBrachial ArteryVasodilator AgentsLungAngiographyPulmonary EmbolismHypertrophy, Right VentricularHeart Defects, CongenitalEndothelial CellsHepatic ArteryCarotid Artery, CommonUltrasonography, PrenatalPulmonary Valve StenosisMonocrotalineTime FactorsUltrasonography, DopplerPulmonary AtresiaTreatment OutcomeNitric OxideHeart Septal Defects, VentricularMiddle Cerebral ArteryVasoconstrictor AgentsDuctus ArteriosusVascular NeoplasmsCeliac ArteryArterial Occlusive DiseasesInfant, NewbornConstriction, PathologicTomography, X-Ray ComputedMyocytes, Smooth MuscleOphthalmic ArteryTetralogy of FallotMesenteric Artery, SuperiorVascular ResistanceAneurysmCoronary Vessel AnomaliesArterio-Arterial FistulaCardiac OutputDogsPulmonary VeinsVentricular Function, RightRenal Artery ObstructionAortaThoracic ArteriesSwineCoronary AngiographyCatheterizationUterine ArteryTemporal ArteriesRegional Blood FlowCord Blood Stem Cell TransplantationTransposition of Great VesselsSheepDose-Response Relationship, DrugPopliteal ArteryDuctus Arteriosus, PatentEchocardiography, DopplerBlood Flow VelocityAorta, ThoracicUlnar Artery15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidEchocardiography