Rationale In CABG patients, the American College of Chest Physicians Evidence-Based Clinical Practice Guidelines (8th Edition), 2008,(12) recommend routine prophylaxis with LMWH, LDUH, or optimally used bilateral GCS or IPC. The guidelines are based on moderate to low quality evidence and the strength of the recommendation is weak as there have been no randomized controlled trials. Optimally used stockings may not be applicable to many CABG patients because of saphenous vein harvesting and hence pharmacologic means are preferable.