The symptoms are self explanatory and physical examination will help to arrive at provisional diagnosis.
Pulse in the feet: Low pulse
Ankle-brachial index (ABI): Comparison among blood pressure at the level of arm and ankle. ABI ratio of less than 0.90 directs a good diagnostician to advise further investigations to rule out other conditions.
Segmental Blood pressure: Measuring blood pressure at various levels in the leg to find out the level of blockage.