Cardiac OutputHemodynamicsExercise TestExercise TherapyExerciseExercise ToleranceThermodilutionPhysical 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 Velocity