Cardiac OutputThermodilutionDye Dilution TechniqueCardiography, ImpedanceOxygen ConsumptionCatheterization, Swan-GanzDiagnostic Techniques, CardiovascularPhysiologyPulmonary CirculationHeart Function TestsOxygenCalorimetry, IndirectCarbon DioxideRegional Blood FlowPulmonary Gas ExchangeCardiac CatheterizationReproducibility of ResultsExerciseHypertension, PulmonaryVascular ResistanceHemodynamicsBlood Flow VelocityModels, Biological