Surgical repair of isolated anterior mitral leaflet cleft via right minithoracotomy.

Isolated anterior mitral leaflet cleft (AMLC) is rare. Several surgical procedures have been described; however, there are few reports which described mitral repair using minimally invasive cardiac surgery for AMLC. We describe successful repair for isolated AMLC via right minithoracotomy. A 29-year-old woman with moderate mitral regurgitation (MR) diagnosed by echocardiogram several years previously presented with dyspnea on exertion. Transthoracic echocardiography revealed severe MR due to an AMLC in the central portion of A2. An autologous pericardial patch augmentation combined with artificial chorda reconstruction under right minithoracotomy approach was performed. It enabled to gain adequate leaflet coaptation area, and MR was effectively controlled by these procedures. <Learning objective: The aim of this case report is to describe a successful operation for congenital mitral valve insufficiency under minimally invasive cardiac surgery. We managed some surgical techniques because of different anatomy unlike other adult valvular disease. There are few reports of surgical repair for isolated anterior mitral leaflet cleft.>.