Transvenous catheter ablation of a posteroseptal accessory pathway in a patient with coexistent posteroseptal and right-sided accessory pathways.

Transvenous catheter ablation techniques have recently been used successfully in blocking posteroseptal accessory pathways in patients with Wolff-Parkinson-White syndrome (WPWS). We report the case of a patient in the People's Republic of China who had WPWS and posteroseptal and right anterolateral accessory pathways, and who had failed to respond to conventional antiarrhythmic drug therapy. The posteroseptal accessory pathway was ablated successfully. During 23 months of follow-up there were no complications; this led us to conclude that this technique can be used to achieve successful long-term ablation of this accessory pathway. This technique obviates the need for drug therapy and direct surgical ablation; it offers, as well, the advantages of shorter hospitalization, lower cost, a much shorter convalescence, and less discomfort to the patient.