EchocardiographyEchocardiography, TransesophagealEchocardiography, Three-DimensionalEchocardiography, DopplerEchocardiography, Doppler, ColorUltrasonography, DopplerEchocardiography, StressEchocardiography, Doppler, PulsedUltrasonography, Doppler, ColorDoppler EffectBlood Flow VelocityUltrasonography, Doppler, PulsedVentricular Function, LeftVentricular Dysfunction, LeftDobutamineMitral ValveUltrasonography, Doppler, TranscranialHeart VentriclesStroke VolumeDiastoleObserver VariationSystoleSensitivity and SpecificityPredictive Value of TestsHeart DiseasesReproducibility of ResultsMyocardial ContractionHeart AtriaLaser-Doppler FlowmetryCardiac CatheterizationMitral Valve InsufficiencyProspective StudiesHeart Septal Defects, AtrialHemodynamicsHeart Valve DiseasesUltrasonography, PrenatalElectrocardiographyFetal HeartContrast MediaHeart Defects, CongenitalCoronary CirculationExercise TestFeasibility StudiesAortic ValveTricuspid Valve InsufficiencyVentricular Function, RightHeart SeptumAortic Valve StenosisHeart NeoplasmsCardiotonic AgentsEchocardiography, Four-DimensionalAtrial Function, LeftTricuspid ValveHeart Valve ProsthesisUltrasonographyImage Interpretation, Computer-AssistedCell Nucleus StructuresVentricular Dysfunction, RightHeart FailureCardiomyopathiesTorsion, MechanicalHypertrophy, Left VentricularHeartMitral Valve StenosisMyocardial IschemiaRegional Blood FlowCardiac VolumePulsatile FlowIntranuclear SpaceAortic Valve InsufficiencyMyocardial InfarctionDipyridamoleMitral Valve ProlapseTime FactorsVentricular RemodelingImage EnhancementFollow-Up StudiesCardiomyopathy, DilatedHeart MurmursCardiomyopathy, HypertrophicCoronary AngiographyPericardial EffusionHeart Septal Defects, VentricularCoronary DiseaseMyocardiumPulmonary ArteryImage Processing, Computer-AssistedUmbilical ArteriesTreatment OutcomeBlood PressureHeart Valve Prosthesis ImplantationElasticity Imaging TechniquesSeverity of Illness IndexFluorocarbonsHypertension, PulmonaryCardiac OutputCardiac Surgical ProceduresHeart Function TestsLasersHeart Aneurysm