EchocardiographyEchocardiography, TransesophagealEchocardiography, Three-DimensionalEchocardiography, DopplerEchocardiography, Doppler, ColorUltrasonography, DopplerEchocardiography, StressEchocardiography, Doppler, PulsedUltrasonography, Doppler, ColorDoppler EffectBlood Flow VelocityUltrasonography, Doppler, PulsedDobutamineVentricular Function, LeftVentricular Dysfunction, LeftMitral ValveUltrasonography, Doppler, TranscranialHeart VentriclesStroke VolumeBlood CirculationDiastoleCoronary CirculationSensitivity and SpecificitySystoleObserver VariationHeart DiseasesPredictive Value of TestsCardiac CatheterizationHemodynamicsMitral Valve InsufficiencyHeart AtriaProspective StudiesHeart Septal Defects, AtrialUltrasonography, PrenatalMyocardial ContractionHeart Valve DiseasesFetal HeartHeart Defects, CongenitalPulmonary CirculationElectrocardiographyContrast MediaReproducibility of ResultsExercise TestAortic ValveTricuspid Valve InsufficiencyLaser-Doppler FlowmetryFeasibility StudiesHeart NeoplasmsCardiotonic AgentsHeart SeptumAortic Valve StenosisTricuspid ValveEchocardiography, Four-DimensionalRegional Blood FlowVentricular Function, RightHeart Valve ProsthesisHeartPulsatile FlowAtrial Function, LeftExtracorporeal CirculationHypertrophy, Left VentricularBlood PressureHeart FailureTime FactorsCardiomyopathiesMitral Valve StenosisPulmonary ArteryCollateral CirculationVentricular Dysfunction, RightMyocardial InfarctionCardiac VolumeDipyridamoleMyocardial IschemiaPlacental CirculationAortic Valve InsufficiencyFollow-Up StudiesMitral Valve ProlapseVentricular RemodelingPregnancyCoronary AngiographyCerebrovascular CirculationUmbilical ArteriesCardiac OutputCoronary DiseaseHeart MurmursHypertension, PulmonaryHeart Septal Defects, VentricularCardiomyopathy, HypertrophicUltrasonographyPericardial EffusionTreatment OutcomeVascular ResistanceMyocardiumCardiomyopathy, DilatedCardiac Surgical ProceduresHeart Valve Prosthesis ImplantationFluorocarbonsHeart RateHeart Function TestsSeverity of Illness Index