Mitral valve prolapse is a well-known condition that is generally benign, but can be associated with cardiac arrhythmias, particularly malignant ventricular arrhythmias and sudden cardiac death.This association and its outcome have been described in medical literature, but the low incidence leads to a lack of evidence regarding its management and stratification.We present the case of a young woman whose initial manifestation was syncope, followed by severe mitral regurgitation and frequent ventricular extrasystoles.She underwent surgical repair with mitral valve plasty and cryoablation of the anterior papillary muscle.The clinical outcome was favorable, as evidenced by an improvement in symptoms and control of the arrhythmia burden.