EchocardiographyEchocardiography, TransesophagealEchocardiography, Three-DimensionalEchocardiography, DopplerEchocardiography, Doppler, ColorUltrasonography, DopplerEchocardiography, StressEchocardiography, Doppler, PulsedUltrasonography, Doppler, ColorDoppler EffectUltrasonography, Doppler, PulsedBlood Flow VelocityDobutamineVentricular Function, LeftVentricular Dysfunction, LeftMitral ValveUltrasonography, Doppler, TranscranialHeart VentriclesStroke VolumeDiastoleSensitivity and SpecificitySystoleObserver VariationHeart DiseasesPredictive Value of TestsCardiac CatheterizationMitral Valve InsufficiencyHeart AtriaHeart Septal Defects, AtrialProspective StudiesMyocardial ContractionHeart Valve DiseasesUltrasonography, PrenatalFetal HeartHemodynamicsHeart Defects, CongenitalCoronary CirculationElectrocardiographyContrast MediaReproducibility of ResultsAortic ValveExercise TestTricuspid Valve InsufficiencyHeart NeoplasmsFeasibility StudiesCardiotonic AgentsEchocardiography, Four-DimensionalTricuspid ValveHeart SeptumAortic Valve StenosisHeart Valve ProsthesisLaser-Doppler FlowmetryVentricular Function, RightAtrial Function, LeftHypertrophy, Left VentricularHeartMitral Valve StenosisCardiomyopathiesHeart FailureVentricular Dysfunction, RightCardiac VolumePulsatile FlowAortic Valve InsufficiencyMyocardial InfarctionDipyridamoleMitral Valve ProlapseVentricular RemodelingMyocardial IschemiaHeart MurmursFollow-Up StudiesCardiomyopathy, HypertrophicCoronary AngiographyPericardial EffusionHeart Septal Defects, VentricularCoronary DiseaseUltrasonographyRegional Blood FlowPulmonary ArteryUmbilical ArteriesCardiomyopathy, DilatedBlood PressureTime FactorsHeart Valve Prosthesis ImplantationFluorocarbonsHypertension, PulmonaryMyocardiumCardiac OutputCardiac Surgical ProceduresHeart Function TestsTreatment OutcomeHeart AneurysmPregnancyAtrial AppendageSeverity of Illness IndexPhonocardiographyMyxomaEmbolismImage Interpretation, Computer-AssistedMonitoring, IntraoperativeFetal Diseases