Graft Occlusion, VascularBlood VesselsVascular PatencySaphenous VeinBlood Vessel ProsthesisPolytetrafluoroethyleneArterial Occlusive DiseasesVeinsGraft SurvivalAmputationIschemiaFemoral ArteryBlood Vessel Prosthesis ImplantationPopliteal ArteryVascular GraftingVascular Surgical ProceduresLegCoronary Artery BypassTreatment OutcomePopliteal VeinPolyethylene TerephthalatesTibial ArteriesTime FactorsReoperationPostoperative ComplicationsFemoral VeinInguinal CanalCoronary OcclusionLower ExtremityThrombosisCoronary-Subclavian Steal SyndromeLimb SalvageBalloon OcclusionFollow-Up StudiesRetinal VesselsLymphatic VesselsRetinal Vein OcclusionRetinal Artery OcclusionArteriesPeripheral Vascular DiseasesRetrospective StudiesStentsIntermittent ClaudicationUltrasonography, Doppler, DuplexCoronary VesselsAspirinCoronary AngiographyTomography, X-Ray ComputedNeovascularization, PhysiologicProspective StudiesMarylandFibrinolytic AgentsEndothelium, VascularDental OcclusionNeovascularization, PathologicBostonInternational Normalized RatioInfarction, Middle Cerebral ArteryCollateral CirculationCerebral ArteriesRisk FactorsBrain IschemiaDisease Models, AnimalEndothelial CellsRegional Blood FlowAnticoagulantsDogsTexasImmunohistochemistryCerebrovascular CirculationCapillariesVascular Endothelial Growth Factor AConstrictionRisk AssessmentCerebral AngiographyConstriction, PathologicMesenteric Vascular OcclusionCarotid Artery, InternalBlood Flow VelocityEmbolization, TherapeuticMuscle, Smooth, VascularRetinal VeinCerebral InfarctionKidney TransplantationIliac ArteryMice, Inbred C57BLDental Occlusion, CentricTherapeutic OcclusionBrainRats, Sprague-DawleyPericytesAnastomosis, SurgicalAngiographyCerebral Arterial DiseasesAntigens, CD31AortaRabbitsHemodynamicsReperfusionMagnetic Resonance Angiography