Causes: 72.4% arterioscleroses, in which 6.8% have thromboses, 27.6% arterites. All patients were examined by color Doppler ultrasonography, 19.6% have digital subtraction arteriography (DSA), 44.7% have multi slides computerized tomography (MSCT) angiography for diagnosis, and 71% showed a total obstruction of artery, 79.2% have more one site of lesion.