Left ventricular outflow tract obstruction caused by abnormal mitral valve tendinous Chordae manifesting in the extremely remote period after surgery for partial atrioventricular septal defect: a case report

AVSD has anatomical characteristics that allow it to be associated with LVOTO in various forms; however, much remains unknown about the modes of onset and the progression of the condition. It is reported that most cases of LVOTO after intracardiac repair of AVSD occur within five years postoperatively; however, rare cases can present in the late postoperative period. Among these are cases in which symptoms become apparent due to rare anatomical features such as chordal SAM, or haemodynamic changes associated with lifestyle modifications.