Heart Defects, CongenitalExercise TestHeartExercise ToleranceExerciseHeart RateExercise TherapyOxygen ConsumptionPhysical ExertionCyanosisPhysical EnduranceHeart FailureAnaerobic ThresholdFetal HeartHeart DiseasesPhysical FitnessAsthma, Exercise-InducedHeart Septal DefectsHeart BlockInfant, NewbornElectrocardiographyPulmonary Gas ExchangeBicyclingTime FactorsHeart TransplantationMuscle, SkeletalHemodynamicsTetralogy of FallotHeart Septal Defects, VentricularLactic AcidEchocardiographyCardiac Surgical ProceduresAngina PectorisFollow-Up StudiesCoronary DiseaseRestErgometryProspective StudiesTreatment OutcomeStroke VolumeHeart Septal Defects, AtrialSportsHeart ValvesRisk FactorsRunningOxygenBlood PressureRespirationHeart Function TestsHeterotaxy SyndromeRespiratory Function TestsPredictive Value of TestsTransposition of Great VesselsDyspneaAbnormalities, MultipleMyocardial IschemiaCardiac CatheterizationCardiovascular Physiological PhenomenaRetrospective StudiesHeart AtriaPhysical Education and TrainingAdrenergic beta-AntagonistsEisenmenger ComplexMyocardiumDouble-Blind MethodVentricular Function, LeftPrognosisHypertension, PulmonaryCardiac OutputUltrasonography, PrenatalWalkingElectrocardiography, AmbulatoryAnalysis of VarianceCarbon DioxideCross-Over StudiesBreathing ExercisesLactatesPulmonary ArteryPregnancyChronic DiseaseForced Expiratory VolumeMetabolic EquivalentRegional Blood FlowSeverity of Illness IndexReference ValuesPulmonary CirculationMyocardial InfarctionMuscle FatigueCase-Control StudiesPulmonary VentilationOximetryMyocardial ContractionEchocardiography, DopplerResistance TrainingFetal DiseasesDuctus Arteriosus, PatentLegPulmonary Valve StenosisEndocardial Cushion DefectsReproducibility of Results