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Varicose Veins
What Are Varicose Veins?
duration:02:56
Healthy veins return blood to the heart and lungs so it can be re-oxygenated. A system of valves makes this happen by allowing the blood to flow in only one direction. When valves fail or leak, blood flows backward under the force of gravity and distends the veins. This backward flow, called reflux, causes blood to pool in the veins, resulting in varicose veins.
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