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Venous valves. The most common cause of chronic venous insufficiency is reflux of the venous valves of superficial veins. [2] This may in turn be caused by several conditions: Deep vein thrombosis (DVT), that is, blood clots in the deep veins. Chronic venous insufficiency caused by DVT may be described as postthrombotic syndrome. DVT triggers ...
Chronic venous insufficiency (CVI) is when the valves in the leg veins don’t work right and inappropriately allow blood to flow backward, back into the legs/feet from the effects of gravity.
Occasionally they result from chronic venous insufficiency. [2] Underlying causes include weak or damaged valves in the veins. [1] They are typically diagnosed by examination, including observation by ultrasound. [2] By contrast, spider veins affect the capillaries and are smaller. [1] [7]
The venous circulation going back to the heart, on the other hand, is a low-pressure system with a central venous pressure around 5mm Hg. This means that the movement of blood has to rely heavily on what’s called the skeletal muscle pump, which is just a way of saying that it relies on the contraction of surrounding skeletal muscles, which ...
Venous insufficiency is the most common disorder of the venous system, and is usually manifested as either spider veins or varicose veins. Several treatments are available including endovenous thermal ablation (using radiofrequency or laser energy), vein stripping, ambulatory phlebectomy, foam sclerotherapy, laser, or compression. [citation needed]
When the valves of perforator veins become incompetent they can cause venous reflux when the muscles contract. This has been explained by Mark Whiteley as "active venous reflux". [4] The resulting reflux can cause a rapid deterioration in an existing varicose disease and be responsible for the development of venous ulcers.
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