Renal Artery ObstructionRenal ArteryArterial Occlusive DiseasesCineangiographyRetinal Artery OcclusionPulmonary ArteryAngioplasty, BalloonCollateral CirculationIntestinal ObstructionAirway ObstructionArteriesCoronary AngiographyHypertension, RenovascularUreteral ObstructionCarotid ArteriesAngiographyFemoral ArteryMesenteric ArteriesIliac ArteryKidneyDuodenal ObstructionStentsCerebral ArteriesRenal VeinsUrinary Bladder Neck ObstructionUrethral ObstructionTreatment OutcomeBasilar ArteryNasal ObstructionGastric Outlet ObstructionAneurysmAorta, AbdominalHypertension, RenalVentricular Outflow ObstructionVentricular Dysfunction, LeftRenal CirculationCoronary Artery BypassErectile DysfunctionCeliac ArteryBlood PressureTomography, X-Ray ComputedVertebral ArteryTime FactorsMesenteric Artery, SuperiorRadial ArteryRadioisotope RenographyMammary ArteriesAngioplastyEndothelium, VascularRetrospective StudiesSplenic ArteryCarotid Artery, InternalVasodilationSubclavian ArteryBrachial ArteryHepatic ArteryMagnetic Resonance AngiographyCoronary VesselsFollow-Up StudiesLacrimal Duct ObstructionCarotid Artery DiseasesVasoconstrictionNephrectomyPostoperative ComplicationsBlood Vessel Prosthesis ImplantationAortographyDogsAngiography, Digital SubtractionConstriction, PathologicDisease Models, AnimalUltrasonography, Doppler, DuplexAortic Aneurysm, AbdominalProspective StudiesCarotid Artery, CommonVascular Surgical ProceduresHemodynamicsVasodilator AgentsHydronephrosisArteriosclerosisIodohippuric AcidVascular PatencyHypertensionMuscle, Smooth, VascularRegional Blood FlowBlood Vessel ProsthesisVascular DiseasesCreatinineGlomerular Filtration RateTechnetium Tc 99m PentetateOphthalmic ArteryRats, Sprague-DawleyVasoconstrictor AgentsReninUltrasonography, DopplerMiddle Cerebral ArteryUmbilical ArteriesCaptoprilSeverity of Illness IndexTechnetium Tc 99m MertiatideNitric Oxide