Mesenteric ArteriesMesenteric Artery, SuperiorMesenteric Artery, InferiorArteriesSplanchnic CirculationHindlimbMesenteric Vascular OcclusionCeliac ArterySuperior Mesenteric Artery SyndromeVasoconstrictionVasodilationPulmonary ArteryRegional Blood FlowRenal ArteryVasoconstrictor AgentsCerebral ArteriesMuscle, Smooth, VascularCarotid ArteriesFemoral ArteryVasodilator AgentsSuperior ColliculiBlood PressureVena Cava, SuperiorMesenteric VeinsBasilar ArteryHemodynamicsVascular ResistanceVisceraBiological FactorsNorepinephrineRats, WistarRats, Sprague-DawleyNG-Nitroarginine Methyl EsterIliac ArterySplenic ArteryAcetylcholineEndothelium, VascularRats, Inbred SHRHepatic ArteryDose-Response Relationship, DrugCoronary Artery BypassVertebral ArteryRats, Inbred WKYConsciousnessMethoxaminePhenylephrineRadial ArteryMyographyNitric OxideEndothelinsGanglionic BlockersMammary ArteriesTime FactorsDuodenostomyCarotid Artery, InternalRenal CirculationTomography, X-Ray ComputedHexamethoniumSubclavian ArteryPerfusionNitroprussideSuperior Vena Cava SyndromeAngiographyArginineMuscle ContractionMuscle RelaxationTreatment OutcomeRats, BrattleboroVasomotor SystemCarotid Artery DiseasesCoronary VesselsHeart RateBlood VesselsBrachial ArterySympathetic Nervous SystemHypertensionIndansCarotid Artery, CommonEndothelium-Dependent Relaxing FactorsAorta, AbdominalElectric StimulationAneurysmCalcitonin Gene-Related PeptideNitric Oxide SynthaseSuperior Cervical GanglionRenal Artery ObstructionPhentolamineEnzyme InhibitorsOphthalmic ArteryRats, Inbred StrainsPotassium ChlorideAngiotensin IICharybdotoxinDogsStentsConstriction, Pathologic15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidArterial Occlusive DiseasesRabbitsBradykinin