Mesenteric Artery, SuperiorMesenteric ArteriesSuperior Mesenteric Artery SyndromeMesenteric Artery, InferiorMesenteric Vascular OcclusionCeliac ArteryArteriesSplanchnic CirculationDuodenostomyRenal ArteryMesenteric VeinsSplenic ArteryPulmonary ArteryVasodilationVasoconstrictionMuscle, Smooth, VascularHepatic ArteryTomography, X-Ray ComputedAngiographyCerebral ArteriesCarotid ArteriesFemoral ArteryVasoconstrictor AgentsAneurysmBasilar ArteryVasodilator AgentsDuodenal ObstructionReperfusion InjuryIliac ArteryIschemiaRenal VeinsRats, WistarBiological FactorsEndothelium, VascularNorepinephrineVena Cava, InferiorConstriction, PathologicPhenylephrineUltrasonography, DopplerJejunostomyTreatment OutcomeRats, Sprague-DawleyAcetylcholineVisceraRegional Blood FlowVertebral ArteryIntestinesStentsBlood Vessel Prosthesis ImplantationAneurysm, DissectingCoronary Artery BypassVascular Surgical ProceduresTime FactorsBlood PressureAorta, AbdominalAbdominal PainNitric OxideRats, Inbred WKYRadial ArteryAneurysm, FalseMyographyMammary ArteriesIntestine, SmallInferior ColliculiDose-Response Relationship, DrugMuscle ContractionPortal VeinArterial Occlusive DiseasesCarotid Artery, InternalMesenterySubclavian ArteryEnterostomyPotassium ChlorideEndovascular ProceduresMuscle RelaxationCoronary VesselsCarotid Artery DiseasesAneurysm, RupturedVena Cava, SuperiorAortic Aneurysm, AbdominalBrachial ArterySuperior ColliculiAnastomosis, SurgicalEmbolismNG-Nitroarginine Methyl EsterBlood Flow VelocityDogsVascular DiseasesEmbolization, TherapeuticVascular ResistanceEndothelium-Dependent Relaxing FactorsCarotid Artery, CommonAortographyAortaAorta, ThoracicIndomethacinRetrospective StudiesParenteral Nutrition, Home TotalLigationAngioplasty, Balloon