EchocardiographyEchocardiography, TransesophagealEchocardiography, Three-DimensionalEchocardiography, DopplerEchocardiography, Doppler, ColorUltrasonography, DopplerEchocardiography, StressEchocardiography, Doppler, PulsedUltrasonography, Doppler, ColorLaboratoriesDoppler EffectUltrasonography, Doppler, PulsedBlood Flow VelocityDobutamineVentricular Function, LeftVentricular Dysfunction, LeftMitral ValveUltrasonography, Doppler, TranscranialHeart VentriclesStroke VolumeSensitivity and SpecificityDiastolePredictive Value of TestsObserver VariationHeart DiseasesSystoleCardiac CatheterizationProspective StudiesMitral Valve InsufficiencyHeart AtriaHeart Septal Defects, AtrialReproducibility of ResultsHeart Valve DiseasesMyocardial ContractionUltrasonography, PrenatalHemodynamicsFetal HeartHeart Defects, CongenitalCoronary CirculationElectrocardiographyContrast MediaExercise TestAortic ValveTricuspid Valve InsufficiencyLaboratories, HospitalFeasibility StudiesHeart NeoplasmsCardiotonic AgentsClinical Laboratory TechniquesEchocardiography, Four-DimensionalTricuspid ValveHeart SeptumAortic Valve StenosisHeart Valve ProsthesisLaser-Doppler FlowmetryVentricular Function, RightAtrial Function, LeftHeartAnimals, LaboratoryHypertrophy, Left VentricularCardiomyopathiesHeart FailureMitral Valve StenosisTime FactorsVentricular Dysfunction, RightCardiac VolumeMyocardial InfarctionPulsatile FlowFollow-Up StudiesAortic Valve InsufficiencyDipyridamoleMitral Valve ProlapseMyocardial IschemiaVentricular RemodelingHeart MurmursCoronary AngiographyCardiomyopathy, HypertrophicPericardial EffusionCoronary DiseaseHeart Septal Defects, VentricularUltrasonographyRegional Blood FlowTreatment OutcomePulmonary ArteryBlood PressureMedical Laboratory PersonnelPregnancyCardiomyopathy, DilatedUmbilical ArteriesHeart Valve Prosthesis ImplantationSeverity of Illness IndexMyocardiumFluorocarbonsHypertension, PulmonaryCardiac OutputCardiac Surgical ProceduresHeart Function TestsRetrospective StudiesHeart AneurysmAtrial Appendage