Observational Study that evaluates the interest of Doppler waveforms classification in Peripheral Artery disease

Patients who have Doppler ultrasound scanning in clinical practice currently have a systematic record of Doppler flow on arterial axes of the aorta and right and left lower limbs. The investigators will analyze a posteriori Doppler flow of patients by classifying them using the 3 classifications. The patient will have no constraints related to this study since the recordings are currently performed in clinical routine.

Inclusion Criteria:

• Age greater than or equal to 18 years;
• Social insured
• Patients referred in the department for any arterial examination of the lower limbs.

Exclusion Criteria:

- Patient unfit to understand the instructions of the study

Patients addressed in a vascular center for vascular ultrasound