Successful radiofrequency ablation of an accessory pathway during pregnancy

The preexcitation syndrome is a rare entity during pregnancy. We present a 20-week pregnant patient with Wolff-Parkinson-White syndrome and recurrent episodes of tachycardia with hemodynamic compromise refractory to medical t reatment that required electrical cardioversion several times. Due to the p oor evolution we performed a successful radiofrequency ablation of a right posteroseptal accessory pathway using 70 seconds of total fluoroscopy time without complications. We consider this is an alternative and safer treatme nt in those cases in which the tachyarrhythmias compromise the hemodynamic state during pregnancy.