Venous thromboembolism (VTE) following coronary artery bypass graft (CABG) surgery is a formidable risk in view of various predisposing factors including restriction of activity, history of myocardial infarctions in such patients, presence of multiple predisposing baseline demographic characteristics and risk factors including advanced age and smoking. The reported incidence of asymptomatic deep vein thrombosis (DVT) using duplex ultrasound (DUS) is significant and varies from 16 to 48%, most of the thrombi being calf vein. (1,2,3) The incidence of symptomatic VTE based chiefly on retrospective data ranges from 0.5 to 3.9% for VTE, 0.3 to 0.5% for DVT, 0.2 to 3.9% for PE, and 0.06 to 0.7% for fatal PE. (2-10)The absolute number of affected patients may be significant since the number of such procedures performed every year in the US alone is huge. According to the American Heart Association's Heart Disease and Stroke Statistics - 2008 Update, 469,000 surgical revascularizations were done in the US in 2005.