Figure 1From: Femoral access in 100 consecutive subarachnoid hemorrhage patients: the "craniotomy" of endovascular neurosurgeryFemoral Angiogram Demonstrating Grading System. Two parallel lines drawn to the top and bottom of femoral head. A grade 1 bifurcation occurs below the femoral head. A grade 2 bifurcation occurs in the region of the femoral head. A grade 3 bifurcation occurs above the femoral head.Back to article page