[Transformation of asymptomatic Wolff-Parkinson-White into a symptomatic form as a result of the ablation of the bundle of Kent].

We report the case of an asymptomatic young man, 19 years old, who had a Wolff-Parkinson-White syndrome. A form at risk of potentially severe arrhythmias was detected by the electrophysiological study. The Kent bundle radiofrequency ablation was performed with success. However the patient developed few weeks after, spontaneous paroxysmal junctional tachycardias. Such report indicates that we should remain careful in asymptomatic patients.