Cardiac OutputExercise TestExercise TherapyExerciseExercise ToleranceHemodynamicsThermodilutionPhysical ExertionHeart RateOxygen ConsumptionCardiac Output, LowMyocytes, CardiacHeartBlood PressureVascular ResistanceDye Dilution TechniqueCardiac Output, HighStroke VolumeCardiography, ImpedanceCardiac Surgical ProceduresRegional Blood FlowPhysical EnduranceMuscle, SkeletalTime FactorsDogsArrhythmias, CardiacHeart FailureHeart Function TestsRestMyocardial ContractionPulmonary CirculationPulmonary Gas ExchangeCatheterization, Swan-GanzCardiac CatheterizationDeath, Sudden, CardiacOxygenCardiovascular Physiological PhenomenaBlood VolumeCardiac Pacing, ArtificialHeart VentriclesBicyclingElectrocardiographyMyocardiumVentricular Function, LeftEchocardiographyMonitoring, PhysiologicHeart DiseasesBlood CirculationCarbon DioxideRespirationLactic AcidCardiomegalyCardiac TamponadeBlood Flow VelocityBlood Gas AnalysisAnaerobic ThresholdTreatment OutcomeIndicator Dilution TechniquesCentral Venous PressureCardiac VolumePhysical FitnessRunningProspective StudiesCardiotonic AgentsEchocardiography, DopplerLegNorepinephrineAnalysis of VarianceHeart ArrestPulmonary ArteryModels, CardiovascularCardiovascular SystemCoronary CirculationVentricular Dysfunction, LeftAdaptation, PhysiologicalEpinephrineResistance TrainingReproducibility of ResultsCardiomyopathiesVentricular FunctionMyocardial InfarctionRats, Sprague-DawleyAnoxiaMuscle Stretching ExercisesPropranololEnergy MetabolismPhysical Education and TrainingHeart TransplantationPostureCatecholaminesHypertension, PulmonaryHeart Defects, CongenitalPulmonary Wedge PressureSupine PositionHypotensionAdrenergic beta-AntagonistsVentricular RemodelingSplanchnic CirculationReference ValuesDisease Models, Animal