Mesenteric Artery, SuperiorEmbolismIntracranial Embolism and ThrombosisMesenteric ArteriesMesenteric Artery, InferiorArteriesMesenteric Vascular OcclusionCeliac ArteryCoronary OcclusionRetinal Artery OcclusionArterial Occlusive DiseasesCerebral ArteriesBalloon OcclusionSuperior Mesenteric Artery SyndromeRetinal Vein OcclusionPulmonary ArteryFemoral ArteryRenal ArteryCarotid ArteriesVasodilationCarotid Artery, InternalBasilar ArterySplanchnic CirculationVasoconstrictionMuscle, Smooth, VascularInfarction, Middle Cerebral ArteryIliac ArteryDental OcclusionMesenteric VeinsVasodilator AgentsVertebral ArteryTime FactorsAngiographyCarotid Artery DiseasesTreatment OutcomeBrain IschemiaVasoconstrictor AgentsBiological FactorsEndothelium, VascularRats, WistarTomography, X-Ray ComputedDogsCoronary VesselsSplenic ArteryEmbolization, TherapeuticConstrictionRats, Sprague-DawleyRegional Blood FlowConstriction, PathologicMuscular Atrophy, SpinalCoronary Artery BypassHepatic ArteryCerebral AngiographyStentsBlood PressureNorepinephrineCollateral CirculationSubclavian ArteryRadial ArteryDisease Models, AnimalPhenylephrineIschemiaMiddle Cerebral ArteryCerebral InfarctionAcetylcholineCerebrovascular CirculationMammary ArteriesSurvival of Motor Neuron 1 ProteinGraft Occlusion, VascularMyographyDuodenostomyCarotid Artery ThrombosisBrachial ArteryCerebral Arterial DiseasesDose-Response Relationship, DrugReperfusion InjuryCarotid Artery, CommonNitric OxideHemodynamicsVascular PatencyAneurysmLigationMuscle ContractionRats, Inbred WKYDental Occlusion, CentricTherapeutic OcclusionMagnetic Resonance AngiographyIschemic Attack, TransientOphthalmic ArteryVena Cava, SuperiorCoronary DiseasePopliteal ArteryCoronary AngiographyAngioplasty, BalloonMuscle RelaxationFollow-Up StudiesCarotid Artery, ExternalCarotid StenosisRats, Inbred SHRRenal Artery Obstruction