EchocardiographyEchocardiography, TransesophagealEchocardiography, Three-DimensionalEchocardiography, DopplerEchocardiography, Doppler, ColorUltrasonography, DopplerEchocardiography, StressEchocardiography, Doppler, PulsedUltrasonography, Doppler, ColorDoppler EffectUltrasonography, Doppler, PulsedBlood Flow VelocityDobutamineSensitivity and SpecificityVentricular Function, LeftVentricular Dysfunction, LeftMitral ValveUltrasonography, Doppler, TranscranialHeart VentriclesPredictive Value of TestsStroke VolumeDiastoleObserver VariationReproducibility of ResultsProspective StudiesHeart DiseasesSystoleCardiac CatheterizationMitral Valve InsufficiencyHeart AtriaHeart Septal Defects, AtrialUltrasonography, PrenatalContrast MediaHeart Valve DiseasesMyocardial ContractionElectrocardiographyFetal HeartHemodynamicsHeart Defects, CongenitalCoronary CirculationExercise TestAortic ValveFeasibility StudiesTricuspid Valve InsufficiencyHeart NeoplasmsCardiotonic AgentsEchocardiography, Four-DimensionalTricuspid ValveHeart SeptumAortic Valve StenosisHeart Valve ProsthesisLaser-Doppler FlowmetryVentricular Function, RightAtrial Function, LeftHeartHypertrophy, Left VentricularDiagnostic ErrorsCardiomyopathiesHeart FailureFollow-Up StudiesMitral Valve StenosisUltrasonographyMyocardial InfarctionVentricular Dysfunction, RightPulsatile FlowDipyridamoleCardiac VolumeTime FactorsCoronary AngiographyMyocardial IschemiaMitral Valve ProlapseAortic Valve InsufficiencyROC CurveHeart MurmursVentricular RemodelingPericardial EffusionCoronary DiseaseCardiomyopathy, HypertrophicRetrospective StudiesTreatment OutcomeSeverity of Illness IndexHeart Septal Defects, VentricularPregnancyRegional Blood FlowPulmonary ArteryPrognosisDiagnostic ImagingCardiomyopathy, DilatedUmbilical ArteriesBlood PressureFluorocarbonsHeart Valve Prosthesis ImplantationMyocardiumHypertension, PulmonaryDiagnostic Tests, RoutineTomography, X-Ray ComputedImage Interpretation, Computer-AssistedHeart Function TestsMagnetic Resonance ImagingCardiac Output