Central Venous PressureVenous PressurePressureBlood PressureHemodynamicsCardiac OutputBlood Pressure DeterminationHeart RateHydrostatic PressurePlasma SubstitutesFluid TherapyVascular ResistanceBlood VolumeIntracranial PressureHypovolemiaPulmonary Wedge PressureLower Body Negative PressureVascular CapacitanceTransducers, PressurePortal PressureHeartHydroxyethyl Starch DerivativesDogsMonitoring, IntraoperativeJugular VeinsRegional Blood FlowHypertensionMyocytes, CardiacCardiac Surgical ProceduresMonitoring, PhysiologicIsotonic SolutionsIntraocular PressureCerebrospinal Fluid PressureVeinsSympathetic Nervous SystemPressoreceptorsTime FactorsSupine PositionAnesthesiaHypotensionHead-Down TiltBlood CirculationPostureBlood Pressure Monitoring, AmbulatoryBaroreflexHypertension, PortalCapillary ResistanceSplanchnic CirculationArterial PressureConstrictionProspective StudiesAnesthesia, GeneralPlethysmographyAtmospheric PressureAir PressureStroke VolumeCatheterization, Central VenousReflexCardiac CatheterizationBlood Loss, SurgicalIntraoperative CareVentricular PressureIntra-Abdominal HypertensionShockHeart FailureHemodilutionOxygenTreatment OutcomeCardiovascular SystemForearmBlood Volume DeterminationPositive-Pressure RespirationAtrial Natriuretic FactorColloidsRespirationPulmonary EdemaOrgan Dysfunction ScoresFemoral VeinVena Cava, InferiorCardiovascular DeconditioningHepatectomyBlood Flow VelocityCardiopulmonary BypassHeart VentriclesCarbon DioxidePortal VeinElectrocardiographyArrhythmias, CardiacPulmonary ArteryIntensive CareCoronary CirculationNorepinephrineShock, SepticAntihypertensive AgentsAnesthesia, EpiduralPulmonary CirculationEchocardiographyRespiration, ArtificialPostoperative CareHematocrit