Surgery for Varicose Viens 3
By : Duksi Published on Friday, March 25, 2016,07:42:12 in Medical Stock Footage
Sound:http://audiojungle.net/item/health-and-medicine/6503929 Varicose veins are veins that have become enlarged and twisted. The term commonly refers to the veins on the leg, although varicose veins can occur elsewhere. Veins have pairs of leaflet valves to prevent blood from flowing backwards (retrograde flow or venous reflux). Leg muscles pump the veins to return blood to the heart (the skeletal-muscle pump), against the effects of gravity.
