DobutamineCardiotonic AgentsEchocardiographyEchocardiography, StressMyocardial ContractionExercise TestVentricular Dysfunction, LeftElectrocardiographyVentricular Function, LeftEchocardiography, TransesophagealAdrenergic beta-AgonistsMyocardial StunningAdrenergic beta-1 Receptor AgonistsHemodynamicsMyocardial IschemiaHeart MurmursCoronary DiseaseStroke VolumeHeartPredictive Value of TestsHydrazonesSensitivity and SpecificityHeart NeoplasmsCoronary CirculationCoronary AngiographyEchocardiography, DopplerHeart VentriclesHeart DiseasesHeart FailureTissue SurvivalHeart RateThallium RadioisotopesMyocardial InfarctionTomography, Emission-Computed, Single-PhotonProspective StudiesCardiomyopathy, DilatedCardiomyopathiesDiastoleEchocardiography, Doppler, ColorSystoleTechnetium Tc 99m SestamibiAmrinoneMilrinoneFollow-Up StudiesHeart AtriaTakotsubo CardiomyopathyCardiac CatheterizationMyocardiumDipyridamoleVentricular DysfunctionHypertrophy, Left VentricularMitral ValvePericardial EffusionChest PainPyridazinesPrognosisEnoximoneEchocardiography, Doppler, PulsedMyxomaBlood PressureTreatment OutcomeObserver VariationDogsMyocardial RevascularizationHeart Septal Defects, VentricularMagnetic Resonance Imaging, CineCardiomyopathy, HypertrophicTime FactorsCardiac OutputSympathomimeticsAortic Valve StenosisRetrospective StudiesCatecholaminesTransposition of Great VesselsAtropineEchocardiography, Three-DimensionalPericarditisPropanolaminesFeasibility StudiesEndocarditis, BacterialCardiac Surgical ProceduresAortic ValveOxygen ConsumptionReproducibility of ResultsAdrenergic beta-AntagonistsVentricular Function, RightPhonocardiographySeverity of Illness IndexHeart SeptumVentricular Dysfunction, RightVentricular Outflow ObstructionCardiac Pacing, ArtificialCoronary Artery DiseaseCoronary Artery BypassReceptors, Adrenergic, betaVasodilator AgentsHeart Septal Defects, AtrialRadionuclide VentriculographyHistory, Early Modern 1451-1600Heart Aneurysm