Mesenteric Artery, SuperiorMesenteric ArteriesSuperior Mesenteric Artery SyndromeMesenteric Vascular OcclusionCeliac ArteryMesenteric Artery, InferiorDuodenostomySplanchnic CirculationArteriesRenal ArteryMesenteric VeinsSplenic ArteryAngiographyTomography, X-Ray ComputedHepatic ArteryReperfusion InjuryIschemiaStentsDuodenal ObstructionAneurysmConstriction, PathologicVasodilationVasoconstrictionTreatment OutcomeArterial Occlusive DiseasesRenal VeinsCerebral ArteriesPulmonary ArteryMuscle, Smooth, VascularJejunostomyBlood Vessel Prosthesis ImplantationVasoconstrictor AgentsUltrasonography, DopplerFemoral ArteryVisceraRats, WistarIntestinesRegional Blood FlowAneurysm, DissectingCarotid ArteriesIliac ArteryVasodilator AgentsAbdominal PainVascular Surgical ProceduresTime FactorsIntestine, SmallCoronary OcclusionBasilar ArteryAorta, AbdominalRats, Sprague-DawleyAneurysm, FalseEndothelium, VascularCoronary StenosisCoronary VesselsEnterostomyPortal VeinRetinal Artery OcclusionCoronary AngiographyAngioplasty, BalloonNorepinephrinePhenylephrineEndovascular ProceduresBlood Flow VelocityBlood PressureCoronary Artery BypassAortographySyphilis, CardiovascularConstrictionMesenteryEmbolization, TherapeuticAcetylcholineCarotid Artery, InternalEmbolismAneurysm, RupturedBiological FactorsRetrospective StudiesBalloon OcclusionNitric OxideAortic Aneurysm, AbdominalRenal Artery ObstructionVertebral ArteryVascular DiseasesParenteral Nutrition, Home TotalAnastomosis, SurgicalFollow-Up StudiesDogsRats, Inbred WKYRetinal Vein OcclusionLigationDose-Response Relationship, DrugAortaCarotid Artery DiseasesGastric DilatationRefeeding SyndromeMuscle ContractionVascular ResistanceAngioplastyHemodynamicsPotassium ChlorideDisease Models, Animal