Inclusion Criteria:  18 years of age Peripheral arterial stenosis scheduled for endovascular treatment  Exclusion Criteria:  < 18 year of age Unable to give informed consent Estimated GFR ≤30 mL/min Dialysis dependent Unable to receive antiplatelets or periprocedural anticoagulation Pregnancy or breastfeeding Contraindication to adenosine (severe asthma or COPD) WIfI ulcer score <2 (no exposed bone) WIfI infection score <2 (skin and subcutaneous tissues only) WIfI gangrene score <3 (limited to digits) COVID-19 positive NYHA IV heart failure Contra-indication to adenosine including arrhythmia, asthma or allergy