EchocardiographyEchocardiography, TransesophagealEchocardiography, Three-DimensionalEchocardiography, DopplerEchocardiography, StressEchocardiography, Doppler, ColorEchocardiography, Doppler, PulsedDobutamineVentricular Function, LeftVentricular Dysfunction, LeftMitral ValveHeart VentriclesStroke VolumeMitral Valve InsufficiencyHeart DiseasesDilatation, PathologicHeart AtriaVasodilationHeart Septal Defects, AtrialHeart Valve DiseasesDiastolePredictive Value of TestsCardiac CatheterizationSystoleObserver VariationMyocardial ContractionBlood Flow VelocityHeart Defects, CongenitalElectrocardiographyExercise TestSensitivity and SpecificityHeart NeoplasmsCoronary CirculationAortic ValveHypertrophy, Left VentricularHemodynamicsCardiotonic AgentsProspective StudiesArteriolesFetal HeartContrast MediaEchocardiography, Four-DimensionalFeasibility StudiesHeart SeptumAortic Valve InsufficiencyTricuspid Valve InsufficiencyHeart Valve ProsthesisVentricular RemodelingHeartAortic Valve StenosisCardiomyopathiesHeart FailureReproducibility of ResultsMyocardial InfarctionCardiac VolumeTricuspid ValveMitral Valve StenosisVasodilator AgentsMyocardial IschemiaCardiomyopathy, DilatedDipyridamoleMitral Valve ProlapseVentricular Dysfunction, RightVentricular Function, RightAtrial Function, LeftCoronary AngiographyCoronary DiseaseFollow-Up StudiesMyocardiumPericardial EffusionCoronary VesselsHeart Valve Prosthesis ImplantationTime FactorsCardiomyopathy, HypertrophicTreatment OutcomeCardiac Surgical ProceduresCatheterizationHeart MurmursHeart Septal Defects, VentricularBrachial ArteryAtrial AppendageMyxomaEmbolismHeart AneurysmDilatationPulmonary ArteryBlood PressureHypertension, PulmonaryFluorocarbonsHeart Function TestsPia MaterUltrasonography, PrenatalSeverity of Illness IndexTomography, Emission-Computed, Single-PhotonPrognosisEndocarditisForamen Ovale, PatentThrombosisVentricular DysfunctionAortic Diseases