MilrinonePulmonary ArteryArteriesPyridonesPhosphodiesterase 3 InhibitorsFibromatosis, AggressiveHypertension, PulmonaryAmrinoneCardiotonic AgentsCyclic Nucleotide Phosphodiesterases, Type 3Pulmonary CirculationPulmonary Wedge PressureCarotid ArteriesRenal ArteryHemodynamicsCatheterization, Swan-GanzMesenteric ArteriesFemoral ArteryVasodilator AgentsCerebral ArteriesBasilar ArteryCoronary Artery BypassAnoxiaMuscle, Smooth, VascularHydrazonesVasoconstrictionIliac ArterySubclavian ArteryVertebral Artery3',5'-Cyclic-AMP PhosphodiesterasesVasodilationPyridazinesBronchial ArteriesRadial ArteryBlood PressureMammary ArteriesCarotid Artery, InternalEndothelium, VascularDogsVascular ResistanceCardiac CatheterizationHeart Defects, CongenitalCardiac OutputCarotid Artery DiseasesCoronary VesselsPersistent Fetal Circulation SyndromeSplenic ArteryBrachial ArteryPulmonary EmbolismLiddle SyndromeAngiographyLungHypertrophy, Right VentricularHepatic ArteryCarotid Artery, CommonPulmonary Valve StenosisMonocrotalineDobutaminePulmonary AtresiaNitric OxideTime FactorsHeart Septal Defects, VentricularCardiopulmonary BypassDose-Response Relationship, Drug