Renal ArteryRenal Artery ObstructionRegional Blood FlowBlood Flow VelocityArteriesHypertension, RenovascularPulmonary ArteryCerebrovascular CirculationCerebral ArteriesCarotid ArteriesFemoral ArteryBlood PressureRenal CirculationAngiographyMesenteric ArteriesIliac ArteryKidneyLaser-Doppler FlowmetryBasilar ArteryRenal VeinsAngioplasty, BalloonStentsAorta, AbdominalHypertension, RenalDogsMesenteric Artery, SuperiorAneurysmVasodilationVertebral ArteryCeliac ArteryHemodynamicsVascular ResistancePulsatile FlowVasoconstrictionCoronary Artery BypassTime FactorsRadial ArteryHepatic ArteryUltrasonography, DopplerMagnetic Resonance AngiographyMammary ArteriesSplenic ArteryTreatment OutcomeFlow CytometryAngioplastyCarotid Artery, InternalUltrasonography, Doppler, ColorBrachial ArteryVasodilator AgentsSubclavian ArteryCarotid Artery DiseasesOphthalmic ArteryMiddle Cerebral ArteryCarotid Artery, CommonCoronary VesselsEndothelium, VascularAngiography, Digital SubtractionUmbilical ArteriesArterial Occlusive DiseasesTomography, X-Ray ComputedNephrectomyRadioisotope RenographyUltrasonography, Doppler, DuplexMicrospheresMicrocirculationAortographyIschemiaIodohippuric AcidBlood Vessel Prosthesis ImplantationVasoconstrictor AgentsXenon RadioisotopesAortic Aneurysm, AbdominalMuscle, Smooth, VascularNitric OxideSplanchnic CirculationVascular Surgical ProceduresVascular PatencyArteriosclerosisSwineHypertensionBronchial ArteriesRats, Sprague-DawleyReninCaptoprilBlood Vessel ProsthesisOxygenHeart RateRetrospective StudiesPulmonary CirculationGlomerular Filtration RateCoronary AngiographyConstrictionFollow-Up StudiesTechnetium Tc 99m PentetateRheologyTemporal ArteriesCarotid Artery, ExternalProspective StudiesUterine ArteryHyperemia