Blood PressureHeart RateArteriesPressureBlood Pressure DeterminationHypertensionBlood Flow VelocityBlood Pressure Monitoring, AmbulatoryRegional Blood FlowFemoral ArteryCerebral ArteriesMiddle Cerebral ArteryPulmonary ArteryCarotid ArteriesHemodynamicsOphthalmic ArteryPulsatile FlowAntihypertensive AgentsMesenteric Artery, SuperiorMesenteric ArteriesVascular ResistanceRenal ArteryRadial ArteryUmbilical ArteriesCerebrovascular CirculationBrachial ArteryUltrasonography, DopplerHydrostatic PressureTime FactorsBronchial ArteriesUltrasonography, Doppler, PulsedBlood Pressure MonitorsUltrasonography, Doppler, TranscranialSystoleCarotid Artery, InternalBasilar ArteryArterial PressureUterusUltrasonography, Doppler, ColorVasodilationProspective StudiesCardiac OutputDogsIliac ArteryCarotid Artery, CommonVasoconstrictionDevice ApprovalCoronary VesselsCoronary Artery BypassTreatment OutcomeUterine ArteryVertebral ArteryVasodilator AgentsSympathetic Nervous SystemPregnancyDiastoleFollow-Up StudiesReference ValuesEquipment DesignCarotid Artery DiseasesRats, Inbred SHRHypotensionCoronary CirculationAnalysis of VariancePulseMammary ArteriesFetal Growth RetardationTransducers, PressureIntracranial PressureSubclavian ArteryHypotension, OrthostaticRisk FactorsLaser-Doppler FlowmetryReninUltrasonographyIntraocular PressureVasoconstrictor AgentsCarotid Artery, ExternalNorepinephrineSplanchnic CirculationOxygenRenal Artery ObstructionPostureRats, Sprague-DawleySplenic ArteryExerciseCircle of WillisCarbon DioxideKidneySphygmomanometersHypocapniaHepatic ArteryCardiovascular DiseasesRats, Inbred WKYSupine PositionNitroglycerinVenous PressureCircadian RhythmAir PressureGestational Age