Aoka Yoshikazu, Ishizuka Naoko, Sakomura Yasunari, Nagashima Hirotaka, Kawana Masatoshi, Kawai Akihiko, Kasanuki Hiroshi
Department of Cardiology, The Heart Institute of Japan, Tokyo Women's Medical University, Tokyo, Japan.
Ann Thorac Surg. 2004 Feb;77(2):713-5. doi: 10.1016/S0003-4975(03)01217-7.
Accessory mitral valve (AMV) is a rare cause of left ventricular outflow tract (LVOT) obstruction and is extremely rare in adults. We report a case of an older adult with an AMV that caused severe LVOT obstruction. A parachute-like piece of tissue (the AMV) protruding into the LVOT during systole was first detected in a 45-year-old woman by echocardiography. Because the pressure gradient and dyspnea gradually progressed, she finally underwent a successful operation for removal when she was 48 years old.
副二尖瓣（AMV）是左心室流出道（LVOT）梗阻的罕见原因，在成年人中极为罕见。我们报告一例老年患者，其副二尖瓣导致严重的左心室流出道梗阻。一名45岁女性经超声心动图首次检测到一块类似降落伞的组织（副二尖瓣）在收缩期突入左心室流出道。由于压力梯度和呼吸困难逐渐加重，她最终在48岁时成功接受了切除手术。
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