DobutamineExercise TestRisk AssessmentExercise ToleranceExerciseCardiotonic AgentsEchocardiography, StressExercise TherapyPredictive Value of TestsOxygen ConsumptionElectrocardiographyPrognosisPhysical ExertionHeart RateRisk FactorsEchocardiographyCoronary DiseaseProspective StudiesMyocardial InfarctionMyocardial IschemiaFollow-Up StudiesStroke VolumePhysical EnduranceDeath, Sudden, CardiacTime FactorsHemodynamicsVentricular Function, LeftVentricular Dysfunction, LeftAnaerobic ThresholdTomography, Emission-Computed, Single-PhotonCoronary AngiographyMyocardial ContractionSensitivity and SpecificityTreatment OutcomeChest PainHeart FailureAngina PectorisROC CurvePhysical FitnessHeartBiological MarkersAsthma, Exercise-InducedThallium RadioisotopesDipyridamoleCoronary Artery DiseaseBlood PressureTroponin TSeverity of Illness IndexAdrenergic beta-AgonistsBicyclingSurvival AnalysisCoronary CirculationPulmonary Gas ExchangeLactic AcidNatriuretic Peptide, BrainElectrocardiography, AmbulatoryProportional Hazards ModelsRestMyocardial StunningTechnetium Tc 99m SestamibiRetrospective StudiesReproducibility of ResultsMultivariate AnalysisAdrenergic beta-1 Receptor AgonistsCohort StudiesMuscle, SkeletalAdrenergic beta-AntagonistsArrhythmias, CardiacAngina, UnstableCardiac OutputDyspneaErgometryMyocardial RevascularizationKaplan-Meier EstimateSystoleHeart DiseasesAnalysis of VarianceHydrazonesChi-Square DistributionSurvival RateEchocardiography, DopplerHeart Function TestsTroponin IFeasibility StudiesSportsDefibrillators, ImplantableRunningRespiratory Function TestsMyocardial Perfusion ImagingCardiomyopathy, DilatedRiskTachycardia, VentricularOxygenChronic DiseaseVasodilator AgentsMyocardiumCardiovascular Physiological PhenomenaCardiovascular DiseasesDouble-Blind MethodCardiac Catheterization