Mesenteric ArteriesMesenteric Artery, SuperiorMesenteric Artery, InferiorArteriesPostoperative ComplicationsMesenteric Vascular OcclusionCeliac ArterySuperior Mesenteric Artery SyndromePulmonary ArteryRenal ArteryFemoral ArteryCerebral ArteriesVasodilationCarotid ArteriesMuscle, Smooth, VascularVasoconstrictionSplanchnic CirculationBasilar ArteryTreatment OutcomeMesenteric VeinsBiological FactorsVasoconstrictor AgentsIliac ArteryVasodilator AgentsSplenic ArteryEndothelium, VascularHepatic ArteryCoronary Artery BypassTomography, X-Ray ComputedRetrospective StudiesVertebral ArteryNorepinephrineTime FactorsRadial ArteryPhenylephrineMyographyRats, WistarMammary ArteriesCarotid Artery, InternalSubclavian ArteryAngiographyAcetylcholineDuodenostomyIntraoperative ComplicationsCarotid Artery DiseasesRats, Sprague-DawleyRats, Inbred WKYCoronary VesselsFollow-Up StudiesBlood PressureDose-Response Relationship, DrugMuscle ContractionMuscle RelaxationStentsBrachial ArteryNitric OxideVena Cava, SuperiorAneurysmSuperior ColliculiProspective StudiesCarotid Artery, CommonConstriction, PathologicEndothelium-Dependent Relaxing FactorsArterial Occlusive DiseasesRenal Artery ObstructionRisk FactorsRats, Inbred SHRRegional Blood FlowOphthalmic ArteryBlood Vessel Prosthesis ImplantationPotassium ChlorideCharybdotoxin15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidDogsEmbolization, TherapeuticNG-Nitroarginine Methyl EsterVascular Surgical ProceduresUltrasonography, DopplerMiddle Cerebral ArteryUmbilical ArteriesThoracic ArteriesHypertensionRabbitsAorta, ThoracicAneurysm, FalseTemporal ArteriesPopliteal ArteryAortaAnastomosis, SurgicalAorta, AbdominalIndomethacinCoronary AngiographyReoperationBronchial ArteriesEnzyme InhibitorsDiabetes ComplicationsIschemiaUlnar ArteryCatheterizationNitroprusside