Figure 2. Changing patterns of autogenous lower extremity arterial reconstruction during a 20-year period. Types of conduit used are shown in pie charts on the left; the unshaded area indicates the total of all ectopic (arm, lesser saphenous vein, composite) grafts. Breakdown of distal anastomotic sites is illustrated in the pie charts on right, with the unshaded area representing total infrageniculate outflow sites (tibial plus pedal). GSV-rev, reversed greater saphenous vein, GSV-IS, in-situ greater saphenous vein, GSV-NR, nonreversed greater saphenous vein, ARM/LSV, either arm vein or lesser saphenous vein; composite, composite vein, Pop-AK, above-knee popliteal artery; Pop-BK, below-knee popliteal artery.