Fig 5.4.

Representative angiograms of Global Limb Anatomic Staging System (GLASS) stage I disease patterns. The target arterial path (TAP) is outlined in yellow. Left panel, TAP includes the anterior tibial (AT) artery. Femoropopliteal (FP) grade is 0. Infrapopliteal (IP) grade is 2 (3-cm chronic total occlusion; chronic total occlusion of AT artery and total length of disease <10 cm). Right panel, TAP includes the peroneal artery. FP grade is 2 (chronic total occlusion <10 cm; total length of disease <$\raisebox{1ex}{$2$}\!\left/ \!\raisebox{-1ex}{$3$}\right.$). IP grade is 0.