A randomized Multicentric open-label controlled trial. The primary objective of the study is to assess the improvement of endothelial function under sulodexide + conventional treatment (antiplatelet therapy; plus ACE inhibitor; plus Statin in patients with cholesterol total level > 1,35 g/l) or conventional treatment alone in patients with Leriche-Fontaine stage II peripheral arterial obstructive disease (systolic ankle brachial index ABI < 0. 9).