Basilar ArteryArteriesVertebrobasilar InsufficiencyVertebral ArteryCerebral ArteriesPulmonary ArteryCarotid ArteriesSubarachnoid HemorrhageBrain Stem InfarctionsCerebral AngiographyVasospasm, IntracranialMesenteric ArteriesRenal ArteryFemoral ArteryVasodilationVasoconstrictionCarotid Artery, InternalIntracranial AneurysmMuscle, Smooth, VascularIliac ArteryCoronary Artery BypassRadial ArteryArterial Occlusive DiseasesMammary ArteriesVasodilator AgentsDogsMagnetic Resonance AngiographyCarotid Artery DiseasesSerotoninSubclavian ArteryCerebrovascular CirculationMiddle Cerebral ArteryTomography, X-Ray ComputedSplenic ArteryBrachial ArteryPotassium ChloridePapaverineCircle of WillisCoronary VesselsMuscle ContractionHepatic ArteryVasoconstrictor AgentsCarotid Artery, CommonPicolinesRabbitsSumatriptanAcetylcholineEndothelium, VascularAngiography, Digital SubtractionUltrasonography, Doppler, TranscranialCeliac ArteryIschemic Attack, TransientIntracranial ArteriosclerosisTreatment OutcomeAneurysm, RupturedOphthalmic ArteryMesenteric Artery, SuperiorEmbolization, TherapeuticIntracranial Embolism and ThrombosisAngiographyPonsUmbilical ArteriesRenal Artery ObstructionThoracic ArteriesVasomotor SystemTemporal ArteriesCerebral InfarctionTime FactorsBronchial ArteriesNitroprussidePosterior Cerebral ArteryPopliteal ArteryMuscle RelaxationDose-Response Relationship, DrugUlnar ArteryNitroglycerinSubclavian Steal SyndromeStentsInfusions, Intra-ArterialUterine ArteryThrombolytic TherapyBrain StemSpasmConstriction, PathologicIntracranial ThrombosisRegional Blood FlowCoronary AngiographyInjections, Intra-ArterialComaRats, Sprague-DawleyCarotid Artery, External15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidNimodipineCarotid StenosisDilatation, PathologicAneurysmBrain IschemiaRats, Inbred WKYNorepinephrineCarotid Artery Injuries