EmbolismMesenteric Vascular OcclusionMesenteric Artery, SuperiorIntracranial Embolism and ThrombosisMesenteric ArteriesIschemiaMesenteric Artery, InferiorMesenteryCeliac ArteryMesenteric VeinsSplanchnic CirculationVascular DiseasesArteriesBrain IschemiaAngiographyMyocardial IschemiaReperfusion InjuryAngioplasty, BalloonVascular Surgical ProceduresTomography, X-Ray ComputedArterial Occlusive DiseasesIntestinesConstriction, PathologicEmbolectomyEndovascular ProceduresTime FactorsSuperior Mesenteric Artery SyndromeAbdominal PainCerebral ArteriesTreatment OutcomeStentsPulmonary ArteryVasodilator AgentsFemoral ArteryRenal ArteryRats, WistarVascular PatencyRetrospective StudiesCarotid ArteriesVasodilationChronic DiseaseAcute DiseaseEndarterectomyUltrasonography, Doppler, DuplexBlood Vessel Prosthesis ImplantationVasoconstrictionIntestine, SmallMuscle, Smooth, VascularIschemic PreconditioningBasilar ArteryRetinal Artery OcclusionAneurysm, DissectingDigestive System Surgical ProceduresIliac ArteryRats, Sprague-DawleyAngioplastyCoronary OcclusionInfarction, Middle Cerebral ArteryAortic AneurysmCarotid Artery, InternalVasoconstrictor AgentsBiological FactorsEndothelium, VascularBalloon OcclusionVertebral ArteryIschemic Attack, TransientThrombosisSplenic ArteryCoronary VesselsDogsCoronary Artery BypassBlood PressureDisease Models, AnimalRetinal Vein OcclusionNorepinephrineCarotid Artery DiseasesHepatic ArteryFollow-Up StudiesRegional Blood FlowRisk FactorsReperfusionRecurrenceMyocardial Reperfusion InjuryPostoperative ComplicationsSubclavian ArteryRadial ArteryPhenylephrineAcetylcholineConstrictionCerebrovascular CirculationMammary ArteriesNitric OxideMyographyDose-Response Relationship, DrugCardiopulmonary BypassCerebral InfarctionMiddle Cerebral ArteryHemodynamicsFatal OutcomeIntestinal Mucosa