EchocardiographyEchocardiography, TransesophagealEchocardiography, Three-DimensionalEchocardiography, DopplerEchocardiography, Doppler, ColorUltrasonography, DopplerEchocardiography, StressEchocardiography, Doppler, PulsedUltrasonography, Doppler, ColorDoppler EffectUltrasonography, Doppler, PulsedBlood Flow VelocityDobutamineVentricular Function, LeftSensitivity and SpecificityVentricular Dysfunction, LeftMitral ValveUltrasonography, Doppler, TranscranialHeart VentriclesStroke VolumePredictive Value of TestsDiastoleObserver VariationProspective StudiesHeart DiseasesSystoleUltrasonography, PrenatalReproducibility of ResultsCardiac CatheterizationHeart AtriaMitral Valve InsufficiencyHeart Septal Defects, AtrialHeart Valve DiseasesHeart Defects, CongenitalFetal HeartMyocardial ContractionContrast MediaElectrocardiographyHemodynamicsCoronary CirculationExercise TestAortic ValveHeart NeoplasmsFeasibility StudiesTricuspid Valve InsufficiencyCardiotonic AgentsEchocardiography, Four-DimensionalFollow-Up StudiesTricuspid ValveHeart SeptumHeart Valve ProsthesisAortic Valve StenosisLaser-Doppler FlowmetryRetrospective StudiesVentricular Function, RightTime FactorsEarly DiagnosisAtrial Function, LeftHypertrophy, Left VentricularCardiomyopathiesHeartHeart FailureTreatment OutcomePregnancyUltrasonographyMitral Valve StenosisPrenatal DiagnosisMyocardial InfarctionDelayed DiagnosisVentricular Dysfunction, RightPrognosisPulsatile FlowCardiac VolumeAortic Valve InsufficiencyMitral Valve ProlapseMyocardial IschemiaDipyridamolePericardial EffusionHeart MurmursFetal DiseasesVentricular RemodelingSeverity of Illness IndexCoronary AngiographyCardiomyopathy, HypertrophicTomography, X-Ray ComputedHeart Septal Defects, VentricularCoronary DiseaseMagnetic Resonance ImagingPulmonary ArteryCardiomyopathy, DilatedRegional Blood FlowUmbilical ArteriesBlood PressureHypertension, PulmonaryHeart Valve Prosthesis ImplantationInfant, NewbornMyocardiumRisk FactorsFluorocarbonsCardiac Surgical Procedures