Radial ArteryBasilar ArteryCarotid ArteriesCarotid Artery, InternalCarotid Artery DiseasesCarotid Artery, CommonCarotid StenosisArteriesCarotid Artery, ExternalEndarterectomy, CarotidCarotid Artery ThrombosisCerebral ArteriesVertebrobasilar InsufficiencyVertebral ArteryPulmonary ArteryCerebral AngiographyFemoral ArteryCarotid Artery, Internal, DissectionRenal ArteryMesenteric ArteriesCarotid BodyArterial Occlusive DiseasesMagnetic Resonance AngiographyTunica IntimaCarotid SinusCoronary Artery BypassIliac ArteryStentsSubclavian ArteryMuscle, Smooth, VascularCerebrovascular CirculationMammary ArteriesSubarachnoid HemorrhageVasodilationCarotid Artery InjuriesIschemic Attack, TransientIntracranial AneurysmAngiography, Digital SubtractionTomography, X-Ray ComputedAngiographyTunica MediaVasoconstrictionMiddle Cerebral ArteryBrachial ArteryAngioplasty, BalloonBrain Stem InfarctionsCarotid Intima-Media ThicknessUltrasonography, Doppler, DuplexTreatment OutcomeVasospasm, IntracranialOphthalmic ArteryCircle of WillisArteriosclerosisCoronary VesselsBrain IschemiaCerebrovascular DisordersUltrasonography, Doppler, TranscranialSplenic ArteryIntracranial ArteriosclerosisTime FactorsVasodilator AgentsStrokeEndothelium, VascularDogsAneurysmEndarterectomyIntracranial Embolism and ThrombosisHepatic ArteryAngioplastyCerebral InfarctionEmbolization, TherapeuticTemporal ArteriesRisk FactorsBlood PressureRabbitsRegional Blood FlowCeliac ArteryCatheterizationProspective StudiesMesenteric Artery, SuperiorBlood Flow VelocityThoracic ArteriesConstriction, PathologicFollow-Up StudiesIntracranial EmbolismUmbilical ArteriesRenal Artery ObstructionVasoconstrictor AgentsAneurysm, RupturedUltrasonography, Doppler, ColorSerotoninRetinal Artery OcclusionRetrospective StudiesCerebral RevascularizationUltrasonographyAcetylcholineBronchial ArteriesInjections, Intra-ArterialHemodynamicsPopliteal Artery