Mesenteric ArteriesMesenteric Artery, SuperiorMesenteric Artery, InferiorAortic DiseasesConstrictionAorta, AbdominalArterial Occlusive DiseasesArteriesSpinal Cord IschemiaBalloon OcclusionParaplegiaMesenteric Vascular OcclusionEmbolectomyIschemiaVena Cava, InferiorCeliac ArteryAorta, ThoracicEndarterectomySuperior Mesenteric Artery SyndromePulmonary ArteryAortographyCerebral ArteriesReperfusion InjuryAortaRenal ArteryTime FactorsBlood PressureReperfusionInferior ColliculiFemoral ArteryIschemic PreconditioningDogsCarotid ArteriesRegional Blood FlowVasodilationTreatment OutcomeHemodynamicsMuscle, Smooth, VascularVasoconstrictionBasilar ArteryRetinal Artery OcclusionBlood VolumeSplanchnic CirculationRats, Sprague-DawleyCatheterizationAortic Aneurysm, AbdominalCoronary OcclusionIliac ArteryMesenteric VeinsCarotid Artery, InternalSpinal CordVasodilator AgentsVertebral ArteryVasoconstrictor AgentsBiological FactorsRetinal Vein OcclusionDisease Models, AnimalSplenic ArteryEndothelium, VascularAngiographyAcute DiseaseHepatic ArteryTomography, X-Ray ComputedSwineRats, WistarCoronary Artery BypassCoronary VesselsCarotid Artery DiseasesNorepinephrineRadial ArterySubclavian ArteryPhenylephrineMammary ArteriesInfarction, Middle Cerebral ArteryAcetylcholineMyographyConstriction, PathologicEmbolization, TherapeuticStentsRats, Inbred WKYMuscle ContractionBrachial ArteryNitric OxideDose-Response Relationship, DrugDuodenostomyAneurysmMiddle Cerebral ArteryCarotid Artery, CommonCerebral AngiographyMuscle RelaxationBrain IschemiaDental OcclusionOphthalmic ArteryCoronary AngiographyRats, Inbred SHRRenal Artery ObstructionEndothelium-Dependent Relaxing FactorsVascular PatencyLigationRabbits