Mesenteric Artery, SuperiorMesenteric ArteriesEmbolismIntracranial Embolism and ThrombosisSuperior Mesenteric Artery SyndromeMesenteric Vascular OcclusionMesenteric Artery, InferiorCeliac ArteryArteriesSplanchnic CirculationDuodenostomyRenal ArteryMesenteric VeinsSplenic ArteryPulmonary ArteryVasodilationVasoconstrictionCerebral ArteriesAngiographyHepatic ArteryMuscle, Smooth, VascularTomography, X-Ray ComputedFemoral ArteryCarotid ArteriesVasoconstrictor AgentsReperfusion InjuryAneurysmBasilar ArteryVasodilator AgentsIschemiaIliac ArteryDuodenal ObstructionRats, WistarArterial Occlusive DiseasesEndothelium, VascularConstriction, PathologicBiological FactorsNorepinephrineRenal VeinsTreatment OutcomePhenylephrineRegional Blood FlowRats, Sprague-DawleyUltrasonography, DopplerStentsJejunostomyTime FactorsVertebral ArteryAcetylcholineCarotid Artery, InternalVisceraBlood Vessel Prosthesis ImplantationBlood PressureAneurysm, DissectingIntestinesCoronary Artery BypassVascular Surgical ProceduresAorta, AbdominalNitric OxideRadial ArteryAbdominal PainRats, Inbred WKYAneurysm, FalseMammary ArteriesMyographyIntestine, SmallPortal VeinCarotid Artery DiseasesDose-Response Relationship, DrugSubclavian ArteryMuscle ContractionRetinal Artery OcclusionCoronary VesselsEmbolization, TherapeuticDogsMesenteryEndovascular ProceduresEnterostomyAneurysm, RupturedBlood Flow VelocityPotassium ChlorideConstrictionMuscle RelaxationBrachial ArteryAortic Aneurysm, AbdominalVascular DiseasesLigationVascular ResistanceCarotid Artery, CommonVena Cava, SuperiorNG-Nitroarginine Methyl EsterAnastomosis, SurgicalAngioplasty, BalloonSuperior ColliculiAortographyCoronary OcclusionRetrospective StudiesHemodynamicsAortaAorta, Thoracic