Echocardiography, DopplerEchocardiographyCoronary CirculationBlood Flow VelocityCoronary VesselsEchocardiography, Doppler, ColorDiastoleObserver VariationEchocardiography, TransesophagealCoronary StenosisEchocardiography, Three-DimensionalEchocardiography, Doppler, PulsedCoronary AngiographyReproducibility of ResultsEchocardiography, StressUltrasonography, DopplerUltrasonography, Doppler, ColorMitral ValveDoppler EffectVentricular Function, LeftVentricular Dysfunction, LeftSensitivity and SpecificityStroke VolumePredictive Value of TestsProspective StudiesHeart VentriclesDobutamineSystoleUltrasonography, Doppler, PulsedMitral Valve InsufficiencyCardiac CatheterizationTricuspid Valve InsufficiencyHemodynamicsHeart AtriaAortic ValveHeart DiseasesHeart Septal Defects, AtrialCoronary DiseaseAortic Valve StenosisMyocardial ContractionAtrial Function, LeftTricuspid ValveHeart Valve DiseasesUltrasonography, Doppler, TranscranialVentricular Function, RightElectrocardiographyAortic Valve InsufficiencyVasodilator AgentsHeart MurmursFeasibility StudiesHeart Valve ProsthesisHeart Defects, CongenitalExercise TestHypertension, PulmonaryFetal HeartContrast MediaCardiac OutputHeart SeptumHeart NeoplasmsPulmonary ArteryUltrasonography, PrenatalPhonocardiographyMitral Valve StenosisHeartVentricular Dysfunction, RightHeart FailurePulmonary Wedge PressureCardiomyopathy, HypertrophicHeart Septal Defects, VentricularHypertrophy, Left VentricularCardiomyopathiesBlood PressureHeart Function TestsFollow-Up StudiesPericardial EffusionCardiac VolumeVentricular PressureCardiotonic AgentsTime FactorsMyocardial InfarctionThermodilutionPulmonary VeinsCardiomyopathy, DilatedVentricular DysfunctionVentricular RemodelingSeverity of Illness IndexAtrial Function, RightHeart Valve Prosthesis ImplantationTreatment OutcomeHeart RateVentricular FunctionMyocardial IschemiaCardiac Surgical ProceduresPulsatile FlowRegional Blood FlowPulmonary CirculationLaser-Doppler FlowmetryEchocardiography, Four-DimensionalMitral Valve ProlapseNatriuretic Peptide, Brain