Section 1: Fundamental Considerations; Historical Perspectives; Surgical Anatomy of Perforating Veins; Epidemiology of Chronic Venous Insufficiency; Pathophysiology of Chronic Venous Insufficiency.- Section 2: Clinical Features; Clinical Presentation and Classification of Chronic Venous Disease; Plethysmographic Evaluation of Venous Function; Preoperative Evaluation of Chronic Venous Insufficiency with Duplex Scanning and Venography.- Section 3: Surgical Interventions; Correction of Superficial Reflux; Linton's Operation and Modification of the Open Techniques; Technical Armamentarium for Endoscopic Perforator Vein Surgery; Subfascial Endoscopic Perforator Surgery with Gas Insufflation; Subfascial Endoscopic Perforating Surgery: The Open Technique. Additional Maneuvers for Subfascial Endoscopic Perforator Vein Surgery; Creation of Subfascial Space; Subfascial Dissection, Perforator Division and Ultrasonic Coagulation; Comparison of Open Linton Operation with Subfascial Endoscopic Perforator Surgery; Deep Venous Thrombosis Prophylaxis.- Section 4: Supportive Therapy; Compression Therapy for Treatment of Lower Extremity Chronic Venous Insufficiency and Venous Stasis Ulcers; The Medical Management of Chronic Venous Ulcers; Local Management of Chronic Leg Ulcers.- Section 5: North American Subfascial Endoscopic Perforator Surgery (NASEPS) Registry; Results of the NASEPS Registry.