BIPOLAR TRANSSEPTAL RADIOFREQUENCY ABLATI ON OF A POSTEROSEPTAL BUNDLE OF KENT

The posteroseptal localisation of accessory pathways is sometimes resp onsible for important difficulties for radiofrequency current endocavi tary ablation. Some authors have reported the exceptionally rare use o f the transseptal bipolar mode for ablation of this type of accessory pathway. The authors report the case of a patient in whom failure of u nipolar radiofrequency ablation at the tricuspid and then mitral annul us was followed by immediate success when the bipolar mode was used. T he value of recording with the transseptal dipole at the ablation site is emphasised.