Novel Tracer Methods to Evaluate Muscle Protein Metabolism in Cirrhosis

One venous catheter will be used for bolus injection of multiple labeled AA at the beginning .The second venous catheter will inserted in the other arm for 5 ml of arterialized venous blood draw.Following the infusions, a single muscle biopsy will be performed from the vastus lateralis of the thigh using the Bergstromm needle.