Chronic critical limb ischemia (CCI) is the most severe clinical form of occlusive arterial disease. Its prognosis is terrible, mortality estimated at 50% in five years. However there are no recent epidemiological data on morbidity and mortality of critical ischemia. Moreover, the diagnostic criteria of the ICC associate clinical and hemodynamic criteria and are not subject to a clear consensus. Investigators propose to evaluate the validated diagnostic criteria (TASC VALMI, European working group) in a population of severe ischemia in patients in order to offer relevant simple and reproducible criteria. Secondly Investigators propose to monitor the medium and long term evolution of these patients ICC defined to clarify the prognosis. diagnostic criteria of the different societies: * TASC: Transatlantic criteria: very characteristic pain, wound optional, variable hemodynamic criteria as the presence of a wound or not * VALMI: French criteria derived vascular medical college: characteristic pain, sore, hemodynamic reproducible, reliable criteria * European working group: European definition of criteria, including a characteristic pain, requires no wound, different hemodynamic criteria of 2 others.
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Inclusion Criteria: * All patients suffering from peripheral arterial disease of the lower limbs hospitalized in vascular medicine department of GHPSJ and having a life expectancy greater than one year. Exclusion Criteria: * demented patient psychological condition