Thromboelastography (TEG) measures the coagulation process from initial clotting cascade to clot strength, providing an integrated picture of two separate but simultaneously occuring components of coagulation, thrombosis and lysis. It has been reported to be associated with short and long-term outcome in patients with trauma, coronary artery diseases , pulmonary embolism and, most recently, stroke prevention.The purposes of this study is to evaluate how effective TEG is on predicting END, by producing a range of TEG values correlated with clinical and radiological assessment.