Basilar ArteryMuscle RelaxationVasodilationEndothelium, VascularVasodilator AgentsAcetylcholineArteriesNitric OxideNitroprussideNitroglycerinMuscle, Smooth, VascularVasoconstrictionVasoconstrictor AgentsEndotheliumAorta, ThoracicDose-Response Relationship, DrugMesenteric ArteriesNitric Oxide SynthaseVertebrobasilar InsufficiencyBrachial ArteryAortaRegional Blood FlowCyclic GMPCerebral ArteriesMuscle ContractionVertebral ArteryPhenylephrinePulmonary ArteryNG-Nitroarginine Methyl EsterRats, Sprague-DawleyRabbitsNitric Oxide Synthase Type IIIRelaxationRelaxation TherapyPotassium ChlorideBradykininCarotid ArteriesIndomethacinCoronary VesselsEnzyme InhibitorsVasomotor SystemNitric Oxide DonorsBlood PressureArginineMiddle Cerebral ArterySubarachnoid HemorrhageRenal ArteryNitroarginineBrain Stem InfarctionsEndothelium, CornealGuanylate CyclaseFemoral ArteryCalciumRats, WistarHypertensionDogsCerebral AngiographyBiological FactorsVasospasm, IntracranialRats, Inbred WKYRats, Inbred SHRSodium Chloride, DietaryIsometric ContractionHeterocyclic Compounds, 3-RingSuperoxidesNitratesCells, CulturedSerotoninMuscle, SmoothBlood VesselsMammary Arteries15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidTime FactorsCarotid Artery, InternalIliac ArteryDisease Models, AnimalIntracranial AneurysmPapaverineRats, Inbred DahlCoronary Artery BypassRadial ArteryVascular ResistanceAngiotensin IICharybdotoxinNorepinephrineSwineCerebrovascular CirculationOxadiazolesMuscle TonusSignal TransductionArterial Occlusive DiseasesNitritesMesenteric Artery, SuperiorMethylene BlueMagnetic Resonance AngiographyCattleCarotid Artery DiseasesMice, Inbred C57BLMagnetic Resonance SpectroscopyMice, Knockout