EchocardiographyEchocardiography, TransesophagealEchocardiography, Three-DimensionalEchocardiography, DopplerEchocardiography, Doppler, ColorUltrasonography, DopplerEchocardiography, StressEchocardiography, Doppler, PulsedUltrasonography, Doppler, ColorDoppler EffectBlood Flow VelocityUltrasonography, Doppler, PulsedDobutamineVentricular Function, LeftVentricular Dysfunction, LeftMitral ValveUltrasonography, Doppler, TranscranialSensitivity and SpecificityHeart VentriclesStroke VolumeDiastolePredictive Value of TestsObserver VariationSystoleHeart DiseasesReproducibility of ResultsCardiac CatheterizationProspective StudiesContrast MediaMitral Valve InsufficiencyHeart AtriaHeart Septal Defects, AtrialHemodynamicsMyocardial ContractionCoronary CirculationElectrocardiographyHeart Valve DiseasesUltrasonography, PrenatalFeasibility StudiesHeart Defects, CongenitalExercise TestFetal HeartAortic ValveTricuspid Valve InsufficiencyHeart NeoplasmsLaser-Doppler FlowmetryCardiotonic AgentsTricuspid ValveVentricular Function, RightHeart SeptumAortic Valve StenosisHeartEchocardiography, Four-DimensionalHeart Valve ProsthesisAtrial Function, LeftUltrasonographyCardiomyopathiesHypertrophy, Left VentricularHeart FailurePulsatile FlowNoninvasive VentilationMyocardial InfarctionCoronary AngiographyDipyridamoleTime FactorsMitral Valve StenosisFollow-Up StudiesMagnetic Resonance ImagingCardiac VolumeVentricular Dysfunction, RightMyocardial IschemiaAortic Valve InsufficiencyRegional Blood FlowBlood PressureCoronary DiseaseVentricular RemodelingMitral Valve ProlapseCardiomyopathy, HypertrophicTreatment OutcomeHeart MurmursPericardial EffusionPulmonary ArteryCardiac OutputImage Interpretation, Computer-AssistedFluorocarbonsMyocardiumHeart Function TestsSeverity of Illness IndexHeart Septal Defects, VentricularCardiomyopathy, DilatedPregnancyHypertension, PulmonaryUmbilical ArteriesTomography, Emission-Computed, Single-PhotonHeart Valve Prosthesis ImplantationPrognosisImage EnhancementHeart RateCardiac Surgical ProceduresPhonocardiography