EmbolismIntracranial Embolism and ThrombosisMesenteric ArteriesMesenteric Artery, SuperiorMesenteric Artery, InferiorArteriesMesenteric Vascular OcclusionCoronary OcclusionRetinal Artery OcclusionCeliac ArteryArterial Occlusive DiseasesCerebral ArteriesBalloon OcclusionRetinal Vein OcclusionSuperior Mesenteric Artery SyndromePulmonary ArteryFemoral ArteryRenal ArteryCarotid ArteriesVasodilationCarotid Artery, InternalBasilar ArteryVasoconstrictionMuscle, Smooth, VascularSplanchnic CirculationInfarction, Middle Cerebral ArteryIliac ArteryDental OcclusionMesenteric VeinsVertebral ArteryVasodilator AgentsCarotid Artery DiseasesAngiographyTime FactorsBrain IschemiaTreatment OutcomeVasoconstrictor AgentsBiological FactorsEndothelium, VascularDogsRats, WistarCoronary VesselsTomography, X-Ray ComputedEmbolization, TherapeuticSplenic ArteryConstrictionRats, Sprague-DawleyCoronary Artery BypassRegional Blood FlowHepatic ArteryCerebral AngiographyConstriction, PathologicBlood PressureStentsCollateral CirculationNorepinephrineSubclavian ArteryRadial ArteryMiddle Cerebral ArteryPhenylephrineCerebral InfarctionMammary ArteriesAcetylcholineCerebrovascular CirculationIschemiaGraft Occlusion, VascularDisease Models, AnimalMyographyCarotid Artery ThrombosisBrachial ArteryCerebral Arterial DiseasesCarotid Artery, CommonHemodynamicsVascular PatencyNitric OxideDose-Response Relationship, DrugReperfusion InjuryLigationRats, Inbred WKYDental Occlusion, CentricDuodenostomyAneurysmTherapeutic OcclusionMuscle ContractionIschemic Attack, TransientOphthalmic ArteryMagnetic Resonance AngiographyVena Cava, SuperiorCoronary DiseasePopliteal ArteryCoronary AngiographyMuscle RelaxationCarotid Artery, ExternalCarotid StenosisFollow-Up StudiesAngioplasty, BalloonRats, Inbred SHRRenal Artery ObstructionCoronary CirculationRabbits