Mesenteric ArteriesMesenteric Artery, SuperiorSyndromeMesenteric Artery, InferiorArteriesSuperior Mesenteric Artery SyndromeMesenteric Vascular OcclusionCeliac ArteryPulmonary ArteryRenal ArteryCerebral ArteriesVasodilationMuscle, Smooth, VascularCarotid ArteriesVasoconstrictionFemoral ArterySplanchnic CirculationBasilar ArteryDuodenal NeoplasmsMesenteric VeinsBiological FactorsVasoconstrictor AgentsVasodilator AgentsIliac ArterySplenic ArteryEndothelium, VascularDown SyndromeMetabolic Syndrome XRats, WistarNorepinephrineDuodenostomyCoronary Artery BypassVertebral ArteryHepatic ArteryDuodenal DiseasesTomography, X-Ray ComputedDuodenal ObstructionPhenylephrineRats, Sprague-DawleyRadial ArteryTime FactorsAcetylcholineMyographyMuscle ContractionMammary ArteriesMuscle RelaxationTreatment OutcomeCarotid Artery, InternalDose-Response Relationship, DrugSubclavian ArteryAngiographyBlood PressureIntestine, SmallRats, Inbred WKYCarotid Artery DiseasesCoronary VesselsNitric OxideBrachial ArteryDogsVena Cava, SuperiorSuperior ColliculiCarotid Artery, CommonNephrotic SyndromeEndothelium-Dependent Relaxing FactorsJejunumAneurysmRabbitsIntestinesSjogren's SyndromeRegional Blood FlowRats, Inbred SHRRenal Artery ObstructionStentsOphthalmic ArteryPotassium ChlorideConstriction, PathologicArterial Occlusive DiseasesCharybdotoxin15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidNG-Nitroarginine Methyl EsterRetrospective StudiesDisease Models, AnimalIntestinal MucosaMiddle Cerebral ArteryUmbilical ArteriesIndomethacinHypertensionStomachFollow-Up StudiesUltrasonography, DopplerBrunner GlandsThoracic ArteriesEnzyme InhibitorsCalciumSwineSuperior Vena Cava SyndromeAortaTemporal ArteriesNitric Oxide SynthaseTurner Syndrome