Atherosclerosis/complications; Endarterectomy; Femoral Artery/pathology; Femoral Artery/surgery; Intermittent Claudication/pathology; Intermittent Claudication/surgery; Aged; Catheters; Chronic Disease; Cilostazol; Coronary Artery Bypass; Coronary Artery Disease/complications; Endarterectomy/instrumentation; Endarterectomy/methods; Femoral Artery/diagnostic imaging; Femoral Artery/drug effects; Follow-Up Studies; Heart Failure/complications; Heart Failure/etiology; Humans; Hypertension/complications; Hypertension/etiology; Intermittent Claudication/diagnostic imaging; Intermittent Claudication/drug therapy; Intermittent Claudication/etiology; Male; Platelet Aggregation Inhibitors/therapeutic use; Radiography; Risk Factors; Tetrazoles/therapeutic use; Treatment Outcome; Ultrasonography