Mesenteric ArteriesMesenteric Artery, SuperiorMesenteric Artery, InferiorArteriesMesenteric Vascular OcclusionCeliac ArterySuperior Mesenteric Artery SyndromeCerebral ArteriesPulmonary ArteryRenal ArteryFemoral ArteryCarotid ArteriesVasodilationMuscle, Smooth, VascularVasoconstrictionBasilar ArterySplanchnic CirculationArterial Occlusive DiseasesRetinal Artery OcclusionIliac ArteryCoronary OcclusionMesenteric VeinsCarotid Artery, InternalVasodilator AgentsBiological FactorsVasoconstrictor AgentsBalloon OcclusionVertebral ArteryEndothelium, VascularSplenic ArteryRetinal Vein OcclusionCoronary Artery BypassRats, WistarHepatic ArteryCarotid Artery DiseasesAngiographyNorepinephrineCoronary VesselsTomography, X-Ray ComputedTime FactorsRadial ArteryPhenylephrineTreatment OutcomeRats, Sprague-DawleyInfarction, Middle Cerebral ArterySubclavian ArteryMammary ArteriesAcetylcholineMyographyBlood PressureDogsRegional Blood FlowDuodenostomyConstriction, PathologicStentsRats, Inbred WKYBrachial ArteryNitric OxideMuscle ContractionDose-Response Relationship, DrugEmbolization, TherapeuticCarotid Artery, CommonMuscle RelaxationMiddle Cerebral ArteryVena Cava, SuperiorAneurysmDental OcclusionBrain IschemiaSuperior ColliculiOphthalmic ArteryCerebral AngiographyConstrictionRats, Inbred SHRRenal Artery ObstructionEndothelium-Dependent Relaxing FactorsIschemiaDisease Models, AnimalPopliteal ArteryRabbitsReperfusion InjuryHemodynamicsVascular PatencyCoronary AngiographyLigationNG-Nitroarginine Methyl EsterCarotid Artery, ExternalCarotid Artery ThrombosisPotassium ChlorideUltrasonography, Doppler15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidMagnetic Resonance AngiographyCerebrovascular CirculationCharybdotoxinCoronary DiseaseTemporal ArteriesBlood Vessel Prosthesis ImplantationAngioplasty, BalloonFollow-Up StudiesThoracic ArteriesCerebral Infarction