Atrial Function, RightEchocardiographyPulmonary Wedge PressurePressureBlood PressureHemodynamicsEchocardiography, DopplerEchocardiography, TransesophagealCardiac OutputAtrial FunctionEchocardiography, Three-DimensionalVentricular Function, RightHeart AtriaHypertension, PulmonaryCardiac CatheterizationEchocardiography, StressEchocardiography, Doppler, ColorAtrial Natriuretic FactorDogsVascular ResistanceCatheterization, Swan-GanzAtrial PressureVentricular Function, LeftHeart FailureAtrial Function, LeftVentricular Dysfunction, RightVentricular PressureTricuspid Valve InsufficiencyHeart RatePulmonary ArteryStroke VolumePulmonary CirculationBlood VolumeEchocardiography, Doppler, PulsedHeartHeart Septal Defects, AtrialHeart VentriclesSystoleVena Cava, InferiorBlood CirculationMitral ValveDobutamineBlood Flow VelocityCoronary CirculationVentricular Dysfunction, LeftDiastoleRespirationPredictive Value of TestsProspective StudiesExercise TestFontan ProcedureTime FactorsMitral Valve InsufficiencyNatriuretic Peptide, BrainVagus NerveMyocardial ContractionHydrostatic PressureHeart DiseasesReninPositive-Pressure RespirationElectrocardiographyPulmonary EdemaFollow-Up StudiesMitral Valve StenosisVenous PressureTransducers, PressureHeart Defects, CongenitalHeart SeptumTreatment OutcomeCardiotonic AgentsCardiac VolumeAntihypertensive AgentsBlood Pressure DeterminationVasodilator AgentsReflexPulmonary VeinsRetrospective StudiesObserver VariationHeart Valve DiseasesHypertensionHeart NeoplasmsSensitivity and SpecificityEpoprostenolReproducibility of ResultsNorepinephrinePrognosisSympathetic Nervous SystemVentricular FunctionTricuspid ValveHypertrophy, Left VentricularMyocardiumCardiac Pacing, ArtificialKidneyAortic ValveInfusions, IntravenousFetal HeartCentral Venous PressureFeasibility StudiesMyocardial InfarctionHeart, Artificial