Accessory mitral valve tissue

Abstract

Accessory mitral valve tissue (AMVT) is an extremely rare congenital cardiac anomaly of embryologic development and growth of the endocardial cushion first described by McLean in 1963. The incidence of this anomaly is unknown. It is an unusual cause for subvalvular left ventricular outflow tract (LVOT) obstruction. The common clinical presentations are due to LVOT obstruction [1–3].