An official website of the United States government
Here's how you know
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Inframalleolar (IM)/pedal disease descriptor in Global Limb Anatomic Staging System (GLASS). Representative angiograms of P0 (left), P1 (middle), and P2 (right) patterns of disease.