Fluid TherapyBlood PressurePulseCentral Venous PressureIntra-Abdominal HypertensionMonitoring, IntraoperativeIntraoperative CarePressureFluid ShiftsThermodilutionPlethysmographyStroke VolumeHydroxyethyl Starch DerivativesMonitoring, PhysiologicPhotoplethysmographyHypovolemiaRespiration, ArtificialHemodynamicsCardiac OutputArterial PressureOximetryROC CurveSupine PositionPlasma SubstitutesSystoleTidal VolumeBlood Pressure DeterminationHypertensionPulsatile FlowBlood VolumePulmonary Wedge PressurePredictive Value of TestsShockPostoperative CareHead-Down TiltCardiovascular Surgical ProceduresComplianceProne PositionHydrostatic PressureRespiratory MechanicsEchocardiography, TransesophagealCritical IllnessBlood Pressure Monitoring, AmbulatoryRespirationLiftingBlood Flow VelocityHeart RateAnesthesia, GeneralProspective StudiesVascular ResistanceWater-Electrolyte BalanceArteriesDiastoleVascular StiffnessTransducers, PressureAortaSphygmomanometersElasticityPulse Wave AnalysisBrachial ArteryAntihypertensive AgentsIntracranial PressureRadial ArteryPulmonary ArteryLegCarotid ArteriesTime FactorsReproducibility of ResultsCoronary Artery BypassManometryIntraocular PressureTreatment OutcomeAlgorithmsAir PressureAgingArea Under CurveCardiovascular DiseasesCardiac Surgical ProceduresAtmospheric PressureVenous PressureRegression AnalysisLinear ModelsDogsRegional Blood FlowRisk FactorsVentricular PressurePulse Therapy, DrugFollow-Up StudiesHypotensionAge FactorsModels, CardiovascularReference ValuesHypertrophy, Left VentricularAnalysis of VarianceCohort StudiesCircadian RhythmMethacholine ChlorideDose-Response Relationship, DrugPressoreceptorsCardiovascular System