13
Figure 9. Inframalleolar (IM)/pedal disease descriptor in
GLASS
Representative angiograms of P0 (le), P1 (middle), and P2 (right) patterns of disease.
Table 5. Descriptive summary of GLASS stages of
infrainguinal arterial disease
Estimated PVI outcomes
Stage
Technical
failure 1-year LBP Anatomic pattern
I <10% >70% Short- to intermediate- length FP disease
and/or short-length IP disease; no or
minimal popliteal disease
II <20% 50%-70% Intermediate- to long- length FP disease;
may include popliteal stenosis and/or
short- to intermediate-length IP disease
III >20% <50% Extensive FP or IP occlusions, alone or in
combination with any disease in the other
segment; popliteal CTO
