Exercise TestHeart RateHeartExerciseExercise ToleranceRisk AssessmentExercise TherapyPhysical ExertionOxygen ConsumptionElectrocardiographyPredictive Value of TestsPrognosisRisk FactorsHeart FailureTime FactorsProspective StudiesPhysical EnduranceDeath, Sudden, CardiacBlood PressureMyocardial InfarctionFollow-Up StudiesAnaerobic ThresholdHeart DiseasesElectrocardiography, AmbulatoryCoronary DiseaseStroke VolumeHemodynamicsPhysical FitnessTreatment OutcomeBiological MarkersMyocardial IschemiaAutonomic Nervous SystemAngina PectorisAsthma, Exercise-InducedBicyclingROC CurvePulmonary Gas ExchangeTroponin THeart Rate, FetalChest PainRestAdrenergic beta-AntagonistsNatriuretic Peptide, BrainMuscle, SkeletalEchocardiographySeverity of Illness IndexHeart TransplantationCohort StudiesProportional Hazards ModelsSurvival AnalysisRetrospective StudiesArrhythmias, CardiacVentricular Function, LeftEchocardiography, StressLactic AcidMultivariate AnalysisVentricular Dysfunction, LeftRespirationHeart Function TestsCoronary Artery DiseaseCardiovascular Physiological PhenomenaReproducibility of ResultsSensitivity and SpecificityDyspneaErgometryHeart Defects, CongenitalCoronary AngiographyKaplan-Meier EstimateAnalysis of VarianceDouble-Blind MethodRunningCardiac OutputAngina, UnstableCardiovascular DiseasesTomography, Emission-Computed, Single-PhotonSportsBaroreflexTroponin ITachycardia, VentricularSurvival RateDefibrillators, ImplantableRespiratory Function TestsOxygenReference ValuesRiskChronic DiseaseAge FactorsChi-Square DistributionCase-Control StudiesSyncopeHeart ValvesMyocardiumSystoleSympathetic Nervous SystemCross-Over StudiesPhysical Education and TrainingAcute DiseaseDipyridamoleRegression AnalysisFetal Heart