山浦 泰子¹, 吉川 純一¹, 吉田 清¹, 赤阪 隆史¹, 赤土 正洋¹, 穂積 健之¹, 八木 登志員¹, 前西 文秋¹, 岡田 行功², SHOMURA Toyo²

Yasuko YAMAURA¹, Junichi YOSHIKAWA¹, Kiyoshi YOSHIDA¹, Takashi AKASAKA¹, Masahiro SHAKUDO¹, Takeshi HOZUMI¹, Toshikazu YAGI¹, Fumiaki MAENISHI¹, Yukikatsu OKADA², Toyo SHOMURA²

¹神戸市立中央市民病院循環器センター内科, ²神戸市立中央市民病院循環器センター胸部外科

¹Department of Cardiology, Kobe General Hospital, ²Department of Cardiovascular surgery, Kobe General Hospital

キーワード : Mitral valve repair, Transmitral flow, Doppler echocardiography

The purpose of this study was to compare rest and exercise mitral flow dynamics in patients with a prosthetic mitral valve (Björk-Shiley valve) and in patients undergoing mitral valve repair with a rigid (Carpentier) or flexible (Duran) ring. A Doppler echocardiography was performed at rest and during exercise in 10 patients with a prosthetic mitral valve, 10 with a Carpentier ring and 10 with a Duran ring. There were no significant differences in the mean and peak transmitral flow velocities at rest among the patients who had received a mitral prosthesis, a Carpentier ring, or a Duran ring. However the mean and peak transmitral flow velocities at peak exercise were significantly higher in patients with a mitral prosthesis than in the patients with a Carpentier or a Duran ring. There were no significant differences in mean and peak transmitral flow velocities at rest between the two mitral valve repair groups; however, the flow velocities after exercise were significantly higher in patients with a Carpentier ring. In conclusion, patients after mitral valve repair show a better diastolic valvular function than patients with mitral prosthesis.