Hisatomi Kazuki, Hashizume Koji, Tanigawa Kazuyoshi, Miura Takashi, Matsukuma Seiji, Yokose Shogo, Sumi Mizuki, Eishi Kiyoyuki
Department of Cardiovascular Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan.
Gen Thorac Cardiovasc Surg. 2016 Feb;64(2):105-8. doi: 10.1007/s11748-014-0399-5. Epub 2014 Apr 17.
Accessory mitral valve (AMV) tissue is a congenital anomaly that occurs in association with other congenital anomalies, and is an uncommon cause of left ventricular outflow tract obstruction. It is usually detected in early childhood when accompanied by symptoms of obstruction of the left ventricular outflow tract, and is rarely diagnosed in adults. We present a case of a 53-year-old man who was referred to our institution for evaluation of a systolic heart murmur. Echocardiography disclosed a diagnosis of AMV tissue. This case was uncommon because of the lack of severe obstruction of left ventricular outflow, cardiac symptoms, or other cardiac anomalies. We were able to carry out surgical resection of AMV tissue to avert possible progression of aortic insufficiency and the risk of a cerebrovascular embolization. The patient's postoperative course was uneventful, and postoperative echocardiography showed no residual accessory mitral tissue.
二尖瓣附属组织（AMV）是一种与其他先天性异常相关的先天性畸形，是左心室流出道梗阻的罕见原因。它通常在儿童早期出现左心室流出道梗阻症状时被发现，在成人中很少被诊断出来。我们报告一例53岁男性，因收缩期心脏杂音被转诊至我院评估。超声心动图诊断为AMV组织。该病例不常见，因为缺乏左心室流出道的严重梗阻、心脏症状或其他心脏异常。我们能够对AMV组织进行手术切除，以避免主动脉瓣关闭不全可能的进展和脑血管栓塞的风险。患者术后恢复顺利，术后超声心动图显示无残余二尖瓣附属组织。
