Blood stream in the varicose vein. The veins in the legs have blood up towards the heart. Veins have 1-way valves to forestall blood from flowing again down. endoscopic vein surgery, employing a little lighted scope inserted by way of a tiny incision to dam off a vein 瓣膜弱化或受损可能导致静脉曲张。动脉将血液从心脏输送到身体的其他部位。静脉将血液从身体其他部位输送回心脏。为了使血液回... https://www.sgvascularctr.com/varicose-veins-explained/