Saphenous VeinVeinsVascular PatencyLegGraft Occlusion, VascularIschemiaCoronary Artery BypassAngioscopyVascular Surgical ProceduresFemoral ArteryArterial Occlusive DiseasesPostoperative ComplicationsTreatment OutcomeFollow-Up StudiesVaricose VeinsPopliteal ArteryTibial ArteriesInguinal CanalMammary ArteriesUltrasonography, Doppler, DuplexVascular GraftingCoronary Artery Bypass, Off-PumpJugular VeinsReoperationFemoral VeinBlood Vessel ProsthesisAnastomosis, SurgicalPolytetrafluoroethyleneTissue and Organ HarvestingBlood Vessel Prosthesis ImplantationTime FactorsVenous InsufficiencyAmputationLimb SalvageRetrospective StudiesCoronary Artery DiseasePeripheral Vascular DiseasesLower ExtremityPortal VeinLife TablesProspective StudiesGastric BypassTransplantation, AutologousAneurysmInternal Mammary-Coronary Artery AnastomosisCoronary DiseaseCardiopulmonary Bypass