Left femoral endarterectomy involves surgically removing plaque buildup from the inner wall of the left femoral artery. This procedure is used to improve blood flow to the lower extremities and alleviate symptoms such as leg pain, numbness, and weakness. It is typically performed as an open surgical technique, where the artery is exposed through an incision in the groin and the plaque is carefully removed. Endarterectomy aims to restore blood flow to affected tissues and prevent further complications associated with femoral artery disease.