['peripheral arterial occlusive disease']
['sildenafil 100mg single oral dose', 'placebo, oral intake single dose']

        Inclusion Criteria:

          -  Patient with peripheral arterial desease stade II

          -  Patient with vascular claudication for at least 3 months

          -  Patient able to perform a treadmill walking test with time to walk < 5min

        Exclusion Criteria:

          -  Patient suffering from ischemia

          -  Previous angina or myocardial

          -  Patient treated with nitrates drugs

          -  Patient with severe renal insufficiency

          -  Patient with severe hepatic insufficiency

          -  Patient with hypotension
      