An adult patient with leg pain and gangrene of toe. His ankle to brachial aerial pressure ratio would be less than?
0.3 REF: Sabiston 18th ed chapter 66 ABI Symptoms >1 Normal 0.5-0.9 Intermittent claudication 0.3-0.5 Rest pain <0.3 Gangrene
1
0.3
0.5
0.8