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Venous Insufficiency. Venous insufficiency, also know as venous reflux, is the impaired return of venous blood from the legs and feet, often manifesting as varicose veins, swollen ankles, aching legs, skin changes or venous ulcers. In many cases, venous insufficiency is the result of over-dilation of the venous vessels in the legs.
Chronic venous insufficiency (CVI) is a medical condition in which the veins cannot pump enough blood back to the heart. The most common cause of CVI is superficial venous reflux which is a treatable condition. As functional venous valves are required to provide for efficient blood return from the lower extremities, this condition typically affects the legs.