Is ABI (Ankle Brachial index) lower limb arterial doppler not recommended if patient already has arterial stents in the legs, and if so, what other imaging modality would you consider as first-line?  

ABI is still helpful in follow-up of patients with arterial stents but only gives a sense of global perfusion to the distal limb and may not be helpful in patients with calcified non-compressible vessels, (e.g. CKD, diabetics), so a better assessment is arterial duplex that can visualize the entire ...