Ventricular Function, LeftPerfusionVentricular Function, RightVentricular Dysfunction, LeftVentricular FunctionStroke VolumePerfusion ImagingHeart VentriclesEchocardiographyHeartMyocardial Perfusion ImagingMyocardial ContractionMyocardial InfarctionCoronary CirculationHemodynamicsVentricular Dysfunction, RightSystoleTomography, Emission-Computed, Single-PhotonGated Blood-Pool ImagingMyocardiumDiastoleRadionuclide VentriculographyElectrocardiographyHeart FailureRadionuclide AngiographyTime FactorsHeart Function TestsEchocardiography, DopplerHypertrophy, Left VentricularCoronary DiseaseMyocardial IschemiaTechnetium Tc 99m SestamibiCardiomyopathy, DilatedExercise TestBlood PressureHeart RateCardiac CatheterizationVentriculography, First-PassCardiac OutputVentricular RemodelingCineangiographyTreatment OutcomeDobutamineCoronary AngiographyCardiac VolumeProspective StudiesVentricular PressureDogsFollow-Up StudiesCardiomyopathiesEchocardiography, Doppler, PulsedMagnetic Resonance Imaging, CineMyocardial ReperfusionPredictive Value of TestsCardiotonic AgentsCoronary VesselsBlood Flow VelocityAngiocardiographyAtrial Function, LeftVentricular DysfunctionCoronary Artery BypassContrast MediaOrganotechnetium CompoundsCardiac Pacing, ArtificialRadiopharmaceuticalsEchocardiography, Doppler, ColorChemotherapy, Cancer, Regional PerfusionRegional Blood FlowThallium RadioisotopesHeart DiseasesMitral Valve InsufficiencyMyocardial Reperfusion InjuryMagnetic Resonance ImagingAngina PectorisPhonocardiographyAngioplasty, Balloon, CoronaryMitral ValveReproducibility of ResultsGold RadioisotopesEchocardiography, StressAortic Valve StenosisMyocardial StunningDisease Models, AnimalMagnetic Resonance AngiographyPulmonary ArteryPrognosisAdrenergic beta-AntagonistsTissue SurvivalTricuspid ValveCerebrovascular CirculationSensitivity and SpecificityCoronary Artery DiseaseRecovery of FunctionVascular ResistanceImage Processing, Computer-AssistedObserver VariationCollateral CirculationTomography, X-Ray ComputedCardiac Surgical ProceduresOxygen Consumption