Mesenteric ArteriesMesenteric Artery, SuperiorMesenteric Artery, InferiorAnatomyArteriesMesenteric Vascular OcclusionCeliac ArterySuperior Mesenteric Artery SyndromePulmonary ArteryRenal ArteryCerebral ArteriesVasodilationMuscle, Smooth, VascularCarotid ArteriesFemoral ArteryVasoconstrictionSplanchnic CirculationBasilar ArteryMesenteric VeinsBiological FactorsVasoconstrictor AgentsVasodilator AgentsIliac ArterySplenic ArteryEndothelium, VascularHepatic ArteryVertebral ArteryNorepinephrineCoronary Artery BypassTomography, X-Ray ComputedRadial ArteryPhenylephrineMyographyRats, WistarMammary ArteriesCarotid Artery, InternalAcetylcholineSubclavian ArteryAngiographyDuodenostomyCoronary VesselsRats, Sprague-DawleyAnatomy, ComparativeRats, Inbred WKYMuscle ContractionCarotid Artery DiseasesMuscle RelaxationDose-Response Relationship, DrugNitric OxideBlood PressureVena Cava, SuperiorBrachial ArterySuperior ColliculiTreatment OutcomeCarotid Artery, CommonTime FactorsEndothelium-Dependent Relaxing FactorsAneurysmRats, Inbred SHRRenal Artery ObstructionDissectionRegional Blood FlowStentsOphthalmic ArteryPotassium ChlorideCharybdotoxin15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidArterial Occlusive DiseasesDogsConstriction, PathologicNG-Nitroarginine Methyl EsterAnatomy, ArtisticMiddle Cerebral ArteryUmbilical ArteriesRabbitsBronchial ArteriesThoracic ArteriesUltrasonography, DopplerAorta, ThoracicTemporal ArteriesAortaBlood Vessel Prosthesis ImplantationIndomethacinPopliteal ArteryCadaverCoronary AngiographyHypertensionNitroprussideEnzyme InhibitorsNitric Oxide SynthaseAnatomy, Cross-SectionalAorta, AbdominalVasomotor SystemUlnar ArteryApaminMembrane PotentialsCarotid Artery, ExternalVascular ResistancePrazosinNitroarginine