Ophthalmic ArteryIntracranial AneurysmAneurysmRetinal ArteryAneurysm, InfectedCiliary ArteriesRetinal Artery OcclusionArteriesAortic AneurysmUltrasonography, Doppler, ColorEmbolization, TherapeuticCarotid Artery, InternalAortic Aneurysm, ThoracicHeart AneurysmCerebral AngiographyBlood Flow VelocityAneurysm, DissectingCerebral ArteriesOrbitOphthalmodynamometryIliac AneurysmVision, EntopticCarotid Artery DiseasesCoronary AneurysmPulmonary ArteryCircle of WillisEthmoid SinusitisBlood Vessel Prosthesis ImplantationRenal ArterySubarachnoid Hemorrhage, TraumaticAneurysm, FalseFemoral ArteryEyeCarotid ArteriesArterial Occlusive DiseasesUltrasonography, Doppler, PulsedBasilar ArteryAmaurosis FugaxAortic RuptureIliac ArteryTomography, X-Ray ComputedAngiographyBlood Vessel ProsthesisVertebral ArteryCarotid Artery, ExternalRegional Blood FlowAorta, AbdominalMesenteric ArteriesEthmoid SinusAngiography, Digital SubtractionEnbucrilateLaser-Doppler FlowmetrySubarachnoid HemorrhageCarotid Artery ThrombosisRetinal VeinTreatment OutcomeReceptor, Muscarinic M5Intraocular PressureEndovascular ProceduresAortographyVascular Surgical ProceduresSplenic ArteryStentsRetinal NeoplasmsSubclavian ArteryOptic Neuropathy, IschemicPulsatile FlowCranial Fossa, AnteriorCerebrovascular CirculationFundus OculiCarotid StenosisCollateral CirculationRetinoblastomaCoronary Artery BypassUltrasonography, DopplerBlood PressureCeliac ArteryRadial ArteryUltrasonography, Doppler, TranscranialMesenteric Artery, SuperiorMammary ArteriesReceptor, Muscarinic M3Surgical InstrumentsCarotid Artery, CommonHepatic Artery