Ventricular Function, LeftVentricular Dysfunction, LeftStroke VolumeHeart VentriclesVentricular Function, RightEchocardiographyVentricular FunctionMyocardial InfarctionHeartMyocardial ContractionSystoleRadionuclide VentriculographyGated Blood-Pool ImagingHemodynamicsDiastoleElectrocardiographyRadionuclide AngiographyHeart FailureMyocardiumCoronary CirculationEchocardiography, DopplerHeart Function TestsVentricular Dysfunction, RightCardiomyopathy, DilatedCineangiographyCoronary DiseaseAngiocardiographyVentriculography, First-PassCardiac CatheterizationTime FactorsHeart RateVentricular RemodelingMyocardial IschemiaCardiac VolumeFollow-Up StudiesExercise TestCardiac OutputCardiomyopathiesDobutamineEchocardiography, Doppler, PulsedTreatment OutcomeMitral Valve InsufficiencyCoronary AngiographyProspective StudiesTomography, Emission-Computed, Single-PhotonVentricular PressureCardiotonic AgentsBlood PressureHypertrophy, Left VentricularCoronary Artery BypassMagnetic Resonance Imaging, CineMyocardial ReperfusionPhonocardiographyGold RadioisotopesCardiac Pacing, ArtificialPredictive Value of TestsAngioplasty, Balloon, CoronaryAortic Valve StenosisEchocardiography, Doppler, ColorAngina PectorisTechnetium Tc 99m SestamibiCoronary VesselsHeart DiseasesEchocardiography, StressMitral ValveMyocardial Reperfusion InjuryAdrenergic beta-AntagonistsStreptokinaseRecovery of FunctionCineradiographyKinetocardiographyDogsTissue SurvivalAtrial Function, LeftPrognosisMyocardial StunningNatriuretic Peptide, BrainMetoprololMyocardial RevascularizationVentricular DysfunctionThrombolytic TherapyHeart Valve ProsthesisBlood Flow VelocityVentricular SeptumHeart Valve Prosthesis ImplantationCardiac Surgical ProceduresAortic Valve InsufficiencyRadiopharmaceuticalsArrhythmias, CardiacHeart AneurysmTrimetazidineAortic ValveExercise TolerancePropanolaminesCoronary Artery DiseasePacemaker, ArtificialObserver VariationDisease Models, AnimalPulmonary ArteryPhysical Exertion