Kameda Toru, Mizuno Tomohiro, Kawada Kota, Yoshikawa Tsubasa, Sugiyama Koichi, Katayama Yuzo, Fujii Takeshiro
Department of Cardiovascular Surgery, Toho University Omori Medical Center, Tokyo, Japan.
Ann Thorac Cardiovasc Surg. 2025;31(1). doi: 10.5761/atcs.cr.25-00030.
Left atrial mitral valve chorda (LAMVC) is a rare congenital cardiac anomaly. The abnormal tissue band, like a mitral valve chorda, is attached to the left atrial wall on one side and mostly to the mitral valve leaflet on the other side and the band sometimes disturbs the mitral leaflet motion, followed by mitral regurgitation (MR). We encountered a case with a LAMVC which originated from a papillary muscle and attached to the posterior mitral annulus over the posterior leaflet and caused MR due to restricted mitral leaflet motion.
左房二尖瓣腱索（LAMVC）是一种罕见的先天性心脏异常。这种异常的组织带，类似二尖瓣腱索，一侧附着于左房壁，另一侧大多附着于二尖瓣叶，该组织带有时会干扰二尖瓣叶的运动，继而导致二尖瓣反流（MR）。我们遇到一例左房二尖瓣腱索起源于乳头肌并附着于后叶上方的二尖瓣后瓣环，因二尖瓣叶运动受限而导致二尖瓣反流的病例。
