Mesenteric ArteriesMesenteric Artery, SuperiorMesenteric Artery, InferiorArteriesMesenteric Vascular OcclusionCeliac ArterySuperior Mesenteric Artery SyndromePulmonary ArteryRenal ArteryCerebral ArteriesVasodilationMuscle, Smooth, VascularCarotid ArteriesVasoconstrictionFemoral ArterySplanchnic CirculationSuperior ColliculiVena Cava, SuperiorMesenteric VeinsBasilar ArteryBiological FactorsVasoconstrictor AgentsVasodilator AgentsIliac ArterySplenic ArteryEndothelium, VascularNorepinephrineHepatic ArteryCoronary Artery BypassVertebral ArteryPhenylephrineRadial ArteryRats, WistarMyographyMammary ArteriesAcetylcholineDuodenostomyCarotid Artery, InternalTomography, X-Ray ComputedSubclavian ArteryRats, Sprague-DawleySuperior Vena Cava SyndromeAngiographyRats, Inbred WKYMuscle ContractionMuscle RelaxationTreatment OutcomeDose-Response Relationship, DrugCarotid Artery DiseasesCoronary VesselsBlood PressureTime FactorsNitric OxideBrachial ArteryCarotid Artery, CommonEndothelium-Dependent Relaxing FactorsAneurysmRats, Inbred SHRSuperior Cervical GanglionRegional Blood FlowRenal Artery ObstructionOphthalmic ArteryPotassium ChlorideCharybdotoxinDogsStentsConstriction, Pathologic15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidArterial Occlusive DiseasesNG-Nitroarginine Methyl EsterRabbitsMiddle Cerebral ArteryUmbilical ArteriesThoracic ArteriesUltrasonography, DopplerTemporal ArteriesIndomethacinAortaPopliteal ArteryBronchial ArteriesHypertensionEnzyme InhibitorsAorta, ThoracicNitroprussideNitric Oxide SynthaseVasomotor SystemBlood Vessel Prosthesis ImplantationElectric StimulationMembrane PotentialsUlnar ArteryVascular ResistanceApaminAorta, AbdominalPrazosinCoronary AngiographyCalciumNitroarginineUterine ArteryCarotid Artery, ExternalVascular Surgical Procedures