Ductus Arteriosus, PatentDuctus ArteriosusPlacentaTruncus Arteriosus, PersistentBlood VesselsInfant, NewbornInfant, PrematureIndomethacinTruncus ArteriosusPregnancyInfant, Premature, DiseasesPulmonary ArterySeptal Occluder DeviceCardiac CatheterizationIbuprofenHeart MurmursGestational AgeHeart Defects, CongenitalEndarteritisLigationFetusEchocardiography, Doppler, ColorProstheses and ImplantsHeart Septal Defects, VentricularPlacenta DiseasesPulmonary CirculationFetal HeartInfant, Very Low Birth WeightPlacenta PreviaSheepEchocardiography, DopplerAorta, ThoracicBalloon OcclusionPlacenta AccretaUltrasonography, PrenatalAortographyAortic CoarctationEmbolization, TherapeuticEchocardiographyPlacenta, RetainedPapio papioAbnormalities, MultipleBlood Flow VelocityFetal DiseasesCardiovascular Surgical ProceduresInfant, Extremely Low Birth WeightCardiovascular AgentsAneurysmRespiratory Distress Syndrome, NewbornPersistent Fetal Circulation SyndromeCyclooxygenase InhibitorsAnimals, NewbornTreatment OutcomeBronchopulmonary DysplasiaPregnancy Trimester, ThirdAlprostadilHypertension, PulmonaryAortaLower Extremity Deformities, CongenitalOxygenTrophoblastsLymphatic VesselsCardiac Surgical ProceduresEisenmenger ComplexVasoconstrictionOliguriaIntensive Care Units, NeonatalRetinal VesselsMuscle, Smooth, VascularEnterocolitis, NecrotizingAngiocardiographyAlloysRecurrent Laryngeal Nerve InjuriesPulmonary Valve StenosisAngiographyTocolysisHeart SeptumPhysiognomyPulmonary AtresiaAortic Arch SyndromesRetrospective StudiesHeart Septal DefectsHeart Septal Defects, AtrialInfant, Low Birth WeightAnti-Inflammatory Agents, Non-SteroidalHemodynamicsTetralogy of FallotEquipment DesignTranscription Factor AP-2Neovascularization, PhysiologicPapioFollow-Up StudiesVascular MalformationsCatheterizationPulmonary ValveTocolytic AgentsUltrasonography, DopplerImmunohistochemistryVasodilationTime Factors