INTERVENTIONS. Interventions were performed percutaneously from an antegrade or an over-the-bifurcation approach using 6 French sheaths. Biplane DSA was performed using two views at least 30° apart to evaluate lesion morphology, inflow disease and run-off. For precise documentation of the location of the lesion and the site of intervention a ruler was fixed at patients´ thigh with the distal end exactly overlapping the upper edge of the patella.