[Wolff-Parkinson-White syndrome with a parahisian accessory pathway: the place of cryoablation]

The ablation of parahisian accessory pathways is a challenge because of the risk of atrioventricular block. In this observation, we describe the case of an eleven-year-old girl presenting a parahisian accessory pathway treated successfully by cryoablation. It is a pediatric case, in which, the accessory pathway and the nodo-hisian conduction pathway where superposed in anatomic and electrophysiological terms. Cryoablation should be the method of choice of ablation in pediatric patients.