PressureAbdomenAbdominal MusclesDiaphragmUrodynamicsUrethraRespiratory MechanicsUrinary BladderBlood PressureHydrostatic PressureBlood Pressure DeterminationTransducers, PressureHypertensionIntracranial PressureIntraocular PressureBlood Pressure Monitoring, AmbulatoryAir PressureAtmospheric PressureVenous PressureArterial PressureVentricular PressureHeart RateHemodynamicsCentral Venous PressurePulmonary Wedge PressureAntihypertensive AgentsOsmotic PressureSystoleVascular ResistancePulseDiastoleTime FactorsDogsManometryCerebrospinal Fluid PressurePositive-Pressure RespirationContinuous Positive Airway PressureCardiac OutputPortal PressureRegional Blood FlowHypotensionSympathetic Nervous SystemPressoreceptorsBlood Flow VelocityReninRats, Inbred SHRLower Body Negative PressureProspective StudiesKidneyBaroreflexPostureComplianceOxygenRespirationArteriesHydrocephalus, Normal PressureRats, Sprague-DawleyHeart