Arterial Occlusive DiseasesRenal Artery ObstructionRenal ArteryLegCineangiographyRetinal Artery OcclusionMagnetic Resonance AngiographyIntestinal ObstructionAirway ObstructionPulmonary ArteryUreteral ObstructionAngioplasty, BalloonCollateral CirculationArteriesCoronary AngiographyHypertension, RenovascularDuodenal ObstructionUrinary Bladder Neck ObstructionUrethral ObstructionNasal ObstructionGastric Outlet ObstructionVentricular Outflow ObstructionStentsLacrimal Duct ObstructionAngiographyCarotid ArteriesFemoral ArteryIliac ArteryKidneyMesenteric ArteriesCerebral ArteriesTreatment OutcomeRenal VeinsTomography, X-Ray ComputedBasilar ArteryHydronephrosisAneurysmAorta, AbdominalHypertension, RenalRadioisotope RenographyRenal CirculationCholestasisConstriction, PathologicCeliac ArteryCholestasis, ExtrahepaticCoronary Artery BypassVertebral ArteryRetrospective StudiesMesenteric Artery, SuperiorTime FactorsAngioplastyBlood PressureRadial ArteryPostoperative ComplicationsMammary ArteriesSubclavian ArteryBezoarsCarotid Artery, InternalSplenic ArteryFollow-Up StudiesHepatic ArteryLung Diseases, ObstructiveCarotid Artery DiseasesIleal DiseasesNephrectomyBlood Vessel Prosthesis ImplantationUltrasonography, Doppler, DuplexCoronary VesselsAortographyAngiography, Digital SubtractionTechnetium Tc 99m MertiatideVascular Surgical ProceduresBrachial ArteryAortic Aneurysm, AbdominalDogsJejunal DiseasesProspective StudiesForced Expiratory VolumeCatheterizationVasoconstrictionVascular PatencyCarotid Artery, CommonIodohippuric AcidAnastomosis, SurgicalUreterNasolacrimal DuctBlood Vessel ProsthesisSpirometryArteriosclerosisTechnetium Tc 99m PentetateVasodilationHemodynamicsColonic DiseasesKidney PelvisOphthalmic ArteryUltrasonography, Doppler, ColorUltrasonography, DopplerRegional Blood FlowVascular DiseasesMuscle, Smooth, Vascular