[Syncope in Lown IVb ventricular arrhythmias and mitral valve prolapse].

The indication for antiarrhythmic treatment in patients with the mitral valve prolapse syndrome is based mainly on symptomatology. In patients with a history of syncope in the presence of marked mitral valve reflux, recording of repetitive forms by means of Holter ECG and, when persistent ventricular salvos can be provoked by ventricular stimulation, long-term treatment with antiarrhythmic drugs should be considered. Especially in the case of troublesome palpitations resulting from ventricular extrasystoles, the substances of first choice are beta blockers. If these are not adequately effective, or if their use is contraindicated or not tolerated, class I and Ii antiarrhythmic drugs represent a therapeutic alternative.