Mesenteric Artery, InferiorMesenteric Artery, SuperiorMesenteric ArteriesMesenteric Vascular OcclusionCeliac ArterySuperior Mesenteric Artery SyndromeArteriesRenal ArterySplanchnic CirculationPulmonary ArteryTomography, X-Ray ComputedDuodenostomyAneurysmAortic Aneurysm, AbdominalCerebral ArteriesBlood Vessel Prosthesis ImplantationCarotid ArteriesFemoral ArterySplenic ArteryUltrasonography, DopplerAorta, AbdominalMesenteric VeinsVasodilationVasoconstrictionBasilar ArteryEmbolization, TherapeuticMuscle, Smooth, VascularIschemiaStentsHepatic ArteryAngiographyIliac ArteryEndoleakColitis, IschemicCarotid StenosisTreatment OutcomeConstriction, PathologicRegional Blood FlowVasoconstrictor AgentsCarotid Artery, InternalRetroperitoneal SpaceVasodilator AgentsVertebral ArteryAortographyCoronary Artery BypassArterial Occlusive DiseasesEndothelium, VascularBiological FactorsRadial ArteryMammary ArteriesCarotid Artery DiseasesRats, WistarNorepinephrineSubclavian ArteryPostoperative ComplicationsCoronary VesselsCoronary StenosisTime FactorsAortic Valve StenosisPhenylephrineRetrospective StudiesReperfusion InjuryRenal Artery ObstructionBlood PressureAcetylcholineRats, Sprague-DawleyDuodenal ObstructionBrachial ArteryCarotid Artery, CommonRenal VeinsMyographyNitric OxideVascular Surgical ProceduresRats, Inbred WKYAngioplasty, BalloonMuscle ContractionDose-Response Relationship, DrugDogsCoronary AngiographyAneurysm, DissectingOphthalmic ArteryMiddle Cerebral ArteryVisceraMagnetic Resonance AngiographyVena Cava, InferiorRetinal Artery OcclusionJejunostomyAneurysm, FalseLaparoscopyMuscle RelaxationHemodynamicsUltrasonography, Doppler, DuplexIntestinesFollow-Up StudiesVascular PatencyPotassium ChlorideBlood Flow VelocityPortal VeinThoracic ArteriesSpinal Stenosis