Cerebral Arterial DiseasesCerebral InfarctionBrain IschemiaPeripheral Arterial DiseaseBrain EdemaPeripheral Vascular DiseasesCerebrovascular CirculationIschemic Attack, TransientCerebral ArteriesBrainStrokeIntermittent ClaudicationCerebral PalsyMiddle Cerebral ArteryAnkle Brachial IndexAnkleArterial Occlusive DiseasesCerebral AngiographyInfarction, Middle Cerebral ArteryMalaria, CerebralCerebral VeinsLower ExtremityLegCerebral HemorrhageBrachial ArteryIschemiaRisk FactorsTibial ArteriesBlood Flow VelocityCerebrovascular DisordersBlood PressureMagnetic Resonance ImagingTime FactorsWalkingAnterior Cerebral ArteryIntracranial Arterial DiseasesCerebral Amyloid AngiopathyAmputationVascular DiseasesProspective StudiesPosterior Cerebral ArteryCerebral VentriclesFemoral ArteryRegional Blood FlowSubarachnoid HemorrhageArteriesTreatment OutcomeMagnetic Resonance AngiographyFollow-Up StudiesToesIntracranial Embolism and ThrombosisThromboangiitis ObliteransSeverity of Illness IndexPopliteal ArteryBrain DiseasesDominance, CerebralTomography, X-Ray ComputedIntracranial PressureIntracranial AneurysmSpectroscopy, Near-InfraredCerebral RevascularizationCerebrumVasospasm, IntracranialVascular Surgical ProceduresDisease Models, AnimalCarotid Artery DiseasesPrevalenceDiabetic AngiopathiesPredictive Value of TestsRisk AssessmentAtherosclerosisArteriosclerosisAngiography, Digital SubtractionHypoxia, BrainOxygenArteriosclerosis ObliteransNeuroprotective AgentsPhotoplethysmographyPerinephritisExercise TestAngiographyCardiovascular DiseasesXenon RadioisotopesCarotid ArteriesCarotid StenosisConstriction, PathologicCarbon DioxideBiological MarkersLaser-Doppler FlowmetryBasilar ArteryRats, Sprague-DawleyUltrasonography, DopplerAngioplasty, BalloonPia MaterBlood-Brain BarrierBlood Gas Monitoring, TranscutaneousReperfusionCross-Sectional StudiesTomography, Emission-ComputedCase-Control Studies