What is the difference between chronic venous stasis and chronic arterial insufficiency?

Parallel systems: Diseased arteries cause PVD (peripheral vasc ds.), venous disease causes leg edema, venous discoloration and non-painful ulcers; ulcers from PVD are painful.

Significant: Chronic venous stasis (cvi) is a result of long standing venous insufficiency due to malfunctioning of the valves of either the superficial, deep or both systems of veins. Chronic arterial insufficiency is due to long standing decrease arterial blood flow into either the legs or arms. Venous problems cause leg swelling and discoloration while arterial problems cause pain and even gangrene.

Ulcer artery vs vein: Venous insufficiency is due to high blood pressure of the veins resulting in the leakage of fluid into the tissues of the legs. Compression of the lower extremities and surgery on the veins can correct this. Arterial ulcers are due to problems with arteries. There are larger arteries and small microscopic ones and either or both can have blockages. They usually can be discerned from each other.