Retinal Artery OcclusionRetinal ArteryArteriesOphthalmic ArteryRetinal VeinOphthalmodynamometryArterial Occlusive DiseasesCerebral ArteriesInfarction, Middle Cerebral ArterySusac SyndromePulmonary ArteryCiliary ArteriesFemoral ArteryCarotid ArteriesCarotid Artery, InternalBasilar ArteryFluorescein AngiographyRenal ArteryCarotid Artery DiseasesRetinal Vein OcclusionMesenteric ArteriesVertebral ArteryBrain IschemiaUltrasonography, Doppler, ColorIliac ArteryRetinal VesselsRegional Blood FlowRetinal DiseasesCoronary Artery BypassFundus OculiCarotid Artery, ExternalRadial ArteryMiddle Cerebral ArteryCoronary OcclusionSubclavian ArteryBlood Flow VelocityMammary ArteriesCoronary VesselsCerebral InfarctionCerebral Arterial DiseasesCerebrovascular CirculationCarotid Artery, CommonLaser-Doppler FlowmetrySplenic ArteryBrachial ArteryIschemic Attack, TransientCeliac ArteryBlood PressureCarotid StenosisBalloon OcclusionCerebral AngiographyTreatment OutcomeHepatic ArteryMesenteric Artery, SuperiorAmaurosis FugaxTime FactorsOrbitVasodilationConstrictionBlindnessCarotid Artery ThrombosisRenal Artery ObstructionAngiographyVertebrobasilar InsufficiencyUlnar ArteryDogsDisease Models, AnimalPopliteal ArteryTemporal ArteriesCoronary DiseaseReperfusionVisual AcuityGlaucoma, NeovascularVasoconstrictionCoronary AngiographyTomography, X-Ray ComputedStentsCollateral CirculationMuscle, Smooth, VascularIntraocular PressureEndothelium, VascularUmbilical ArteriesThoracic ArteriesHemodynamicsCoronary CirculationMyocardial InfarctionMagnetic Resonance AngiographyStrokeFibrinolytic AgentsFollow-Up StudiesVasodilator AgentsEmbolization, TherapeuticRetrospective StudiesGanglionectomyRats, Sprague-DawleyBronchial ArteriesNeuroprotective AgentsLigationBrainSneddon Syndrome