Mesenteric ArteriesMesenteric Artery, SuperiorMesenteric Artery, InferiorArteriesMesenteric Vascular OcclusionSuperior Mesenteric Artery SyndromeCeliac ArteryPulmonary ArteryRenal ArteryCerebral ArteriesVasodilationMuscle, Smooth, VascularCarotid ArteriesVasoconstrictionFemoral ArterySplanchnic CirculationBasilar ArteryDuodenal NeoplasmsMesenteric VeinsBiological FactorsVasoconstrictor AgentsVasodilator AgentsIliac ArterySplenic ArteryEndothelium, VascularRats, WistarNorepinephrineVertebral ArteryHepatic ArteryCoronary Artery BypassTomography, X-Ray ComputedDuodenostomyDuodenal DiseasesPhenylephrineRats, Sprague-DawleyDuodenal ObstructionRadial ArterySubclavian ArteryAcetylcholineMuscle ContractionMyographyMammary ArteriesMuscle RelaxationTime FactorsCarotid Artery, InternalDose-Response Relationship, DrugAngiographyBlood PressureRats, Inbred WKYTreatment OutcomeDogsIntestine, SmallCarotid Artery DiseasesVena Cava, SuperiorNitric OxideCoronary VesselsVentricular Function, RightBrachial ArterySuperior ColliculiCarotid Artery, CommonEndothelium-Dependent Relaxing FactorsAneurysmRabbitsJejunumRegional Blood FlowVentricular Dysfunction, RightHuman RightsRats, Inbred SHRIntestinesRenal Artery ObstructionOphthalmic ArteryPotassium ChlorideStentsConstriction, PathologicArterial Occlusive Diseases15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidCharybdotoxinNG-Nitroarginine Methyl EsterMiddle Cerebral ArteryIndomethacinUmbilical ArteriesThoracic ArteriesIntestinal MucosaStomachUltrasonography, DopplerBrunner GlandsCalciumAorta, ThoracicElectric StimulationAortaEnzyme InhibitorsTemporal ArteriesNitric Oxide SynthaseHypertensionMembrane PotentialsApaminVascular ResistanceCoronary AngiographyNitroprussideBronchial Arteries