Mitral_annular_disjunction
Mitral annular disjunction (MAD) is a structural abnormality of the heart in the mitral annulus ring.[1] It is generally defined as an abnormal displacement of the location of where the posterior mitral valve leaflet inserts onto the left atrial wall and the left ventricular wall.[2] This abnormal attachment allows for mitral valve to become hypermobile and can result in ventricular arrhythmias.[3]