Study population flow gram. ∗Excluded cases with concomitant moderate or greater aortic/pulmonary valve disease, significant CAD (including previous coronary intervention), or need for concomitant CABG. ∗∗Patients with AMVP deferred mitral surgery because of absent clinical symptoms. CAD, Coronary artery disease; DMR, degenerative mitral regurgitation; AMVP, arrhythmic mitral valve prolapse; VA, ventricular arrhythmia; CABG, coronary artery bypass graft surgery.