Graft Occlusion, VascularMammary ArteriesThoracic ArteriesInternal Mammary-Coronary Artery AnastomosisVascular PatencyCoronary Artery BypassSaphenous VeinArteriesRadial ArteryVascular GraftingFemoral ArteryArterial Occlusive DiseasesGraft SurvivalTreatment OutcomePolytetrafluoroethyleneBlood Vessel ProsthesisBlood Vessel Prosthesis ImplantationVeinsPopliteal ArteryVascular Surgical ProceduresReoperationGastroepiploic ArteryPostoperative ComplicationsAmputationTime FactorsCoronary AngiographyFollow-Up StudiesIschemiaPulmonary ArteryTherapeutic OcclusionSubclavian ArteryCerebral ArteriesLegEpigastric ArteriesCarotid ArteriesPopliteal VeinPolyethylene TerephthalatesSubclavian Steal SyndromeAnastomosis, SurgicalRetrospective StudiesRenal ArteryTibial ArteriesCoronary DiseaseRetinal Artery OcclusionTomography, X-Ray ComputedBasilar ArteryCoronary VesselsIliac ArteryInguinal CanalMesenteric ArteriesFemoral VeinCoronary OcclusionTransplantsCarotid Artery, InternalLower ExtremityTissue and Organ HarvestingProspective StudiesMyocardial RevascularizationBalloon OcclusionCoronary-Subclavian Steal SyndromeThrombosisCoronary CirculationLimb SalvageStentsSpasmVertebral ArteryUltrasonography, Doppler, DuplexRetinal Vein OcclusionAngioplasty, BalloonPeripheral Vascular DiseasesCarotid Artery DiseasesIntermittent ClaudicationInfarction, Middle Cerebral ArteryCoronary Artery Bypass, Off-PumpAspirinClavicleAngina PectorisBrachial ArteryCarotid Artery, CommonCoronary Artery DiseaseHepatic ArteryFibrinolytic AgentsMarylandRisk FactorsSplenic ArteryMiddle Cerebral ArteryAngiographyCeliac ArteryDental OcclusionBrain IschemiaMesenteric Artery, SuperiorOphthalmic ArteryAngioplasty, Balloon, CoronaryCerebral AngiographyConstriction, PathologicBostonCardiopulmonary BypassDogsInternational Normalized RatioBlood Flow Velocity