Mesenteric Artery, InferiorMesenteric Artery, SuperiorColicMesenteric ArteriesSuperior Mesenteric Artery SyndromeMesenteric Vascular OcclusionArteriesCeliac ArteryRenal ColicSplanchnic CirculationDuodenostomyRenal ArteryPulmonary ArterySplenic ArteryCerebral ArteriesCarotid ArteriesMesenteric VeinsFemoral ArteryHepatic ArteryVasodilationVasoconstrictionBasilar ArteryMuscle, Smooth, VascularAngiographyTomography, X-Ray ComputedIliac ArteryVasoconstrictor AgentsAneurysmVasodilator AgentsVertebral ArteryCoronary Artery BypassEndothelium, VascularRadial ArteryReperfusion InjuryDuodenal ObstructionMammary ArteriesBiological FactorsRats, WistarCarotid Artery, InternalNorepinephrineIschemiaSubclavian ArteryConstriction, PathologicTreatment OutcomePhenylephrineUltrasonography, DopplerRenal VeinsStentsRegional Blood FlowAcetylcholineCarotid Artery DiseasesRats, Sprague-DawleyTime FactorsJejunostomyBrachial ArteryCoronary VesselsBlood PressureBlood Vessel Prosthesis ImplantationVisceraAneurysm, DissectingArterial Occlusive DiseasesIntestinesVascular Surgical ProceduresCarotid Artery, CommonNitric OxideAorta, AbdominalAneurysm, FalseMyographyRats, Inbred WKYDose-Response Relationship, DrugMuscle ContractionAbdominal PainPortal VeinOphthalmic ArteryIntestine, SmallRenal Artery ObstructionMuscle RelaxationPotassium ChlorideMiddle Cerebral ArteryUmbilical ArteriesAneurysm, RupturedFecal ImpactionMesenteryAnastomosis, SurgicalThoracic ArteriesEndovascular ProceduresEnterostomyDogsTemporal ArteriesRetrospective StudiesEmbolization, TherapeuticNG-Nitroarginine Methyl EsterBronchial ArteriesAortic Aneurysm, AbdominalAortaAorta, ThoracicEmbolismAngioplasty, BalloonPopliteal ArteryHorse Diseases