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One day after admission, despite prophylactic anticoagulation dosing, a patient with factor V Leiden mutation demonstrated borderline hypercoagulability on his TEG tracing (dashed lines). Persistent heparin resistance prompted a dose increase to achieve therapeutic anticoagulation on TEG (dotted lines). R: reaction time; K: clot formation time; α: alpha angle; MA: maximum amplitude; LY30: percent lysis at 30 minutes.
