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Updated: May 29, 2026

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
Published on: February 26, 2013
Catheter ablation of accessory pathway in the treatment of pacemaker-mediated tachycardia
Rogelio Robledo-Nolasco1, Martin Ortiz-Avalos, Gerardo Rodriguez-Diez
1Electrophysiology Division, National Medical Center 20 de Noviembre, ISSSTE, Mexico D.F. rogelio_robledo@hotmail.com
Abstract:
Pacemaker-mediated tachycardia (PMT) remains a clinical problem in patients with dual-chamber pacemaker despite technological advances. The onset mechanism of this tachycardia is sensing of retrograde atrial activation after ventricular stimulation. Repeated retrograde conduction perpetuates tachycardia. Postventricular atrial refractory period prolongation has been used for prevention of PMT, but this is not the solution in all cases. We present a case with PMT where the retrograde limb is a left accessory pathway, which is treated with radiofrequency ablation successfully.
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