Rovner Aleksandr, Thanigaraj Srihari, Perez Julio E
Cardiovascular Division, Washington University School of Medicine, St Louis, MO 63110, USA.
J Am Soc Echocardiogr. 2005 May;18(5):494-8. doi: 10.1016/j.echo.2005.01.027.
Accessory mitral valve is a rare congenital abnormality and is an unusual cause for subvalvular left ventricular outflow tract (LVOT) obstruction. It is detected first in children and is very rarely noticed in adults. The most common clinical presentation is symptomatic LVOT obstruction. We present a case series of 5 adult patients with varying clinical presentations in which the accessory mitral valve was diagnosed using echocardiography. Three patients presented with varying degrees of symptomatic LVOT obstruction, one presented with recurrent transient ischemic attack and stroke, and one patient was incidentally diagnosed during echocardiography to exclude endocarditis. Accessory mitral valve should be suggested in patients with LVOT obstruction.
副二尖瓣是一种罕见的先天性异常，是导致瓣膜下左心室流出道（LVOT）梗阻的不寻常原因。它最早在儿童中被发现，在成人中很少被注意到。最常见的临床表现是有症状的LVOT梗阻。我们报告了一组5例成年患者的病例系列，他们有不同的临床表现，通过超声心动图诊断为副二尖瓣。3例患者表现出不同程度的有症状的LVOT梗阻，1例表现为复发性短暂性脑缺血发作和中风，1例患者在超声心动图检查时为排除心内膜炎而偶然被诊断。对于有LVOT梗阻的患者应考虑副二尖瓣的可能。
