149)Ⅳ PacificVascular Symposium on Venous Disease 2002.11.12-15.Hawaii,USA Cardiovascular Disease Center,Fukushima Daiichi Hospital,Fukushima,Japan. Tomohiro Ogawa MD PhD,Shunichi Hoshino MD PhD,Hirofumi Midorikawa MD PhD, Kouichi Sato MD PhD,and Masayuki Koyama MD PhD. Poster Session:Change to Venous Valvular Function Under Heat Stress