title: Catheter ablation of accessory pathway in the treatment of pacemaker-mediated tachycardia.
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.
authors.affiliation: Electrophysiology Division, National Medical Center 20 de Noviembre, ISSSTE, Mexico D.F. rogelio_robledo@hotmail.com
authors.forename: Rogelio
authors.initials: R
authors.lastname: Robledo-Nolasco
authors.forename: Martin
authors.initials: M
authors.lastname: Ortiz-Avalos
authors.forename: Gerardo
authors.initials: G
authors.lastname: Rodriguez-Diez
authors.forename: Humberto
authors.initials: H
authors.lastname: Castro-Villacorta
mesh_terms: D058606:Accessory Atrioventricular Bundle / Q000601:surgery*; D000328:Adult; D002304:Cardiac Pacing, Artificial / Q000009:adverse effects*; D017115:Catheter Ablation; D005260:Female; D006801:Humans; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D013610:Tachycardia / Q000175:diagnosis / Q000601:surgery*; D016896:Treatment Outcome