Cryoablation of a nodoventricular Mahaim fiber.

Abstract

An 11-year old female presented with paroxysmal tachycardia and was diagnosed with a Mahaim fiber during electrophysiologic study. A preexcited tachycardia and the typical variety of AV nodal reentry tachycardia were induced at different times. During preexcited tachycardia, the His bundle electrogram followed the ventricular electrogram, and, introduction of atrial premature beats at different coupling intervals, advanced the peri-AV nodal atrial tissue, with no change in the ventricular cycle length, leading to a diagnosis of an antidromic tachycardia due to a nodoventricular fiber. Cryoablation at a mid-septal location under three-dimensional guidance successfully eliminated both tachycardias without detrimental effects to the AV node.

• Authors: John Papagiannis, Leonidas Vachtsevanos, Spyridon Rammos, Ronald Kanter
• Journal: Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing (J Interv Card Electrophysiol) Vol. 14 Issue 2 Pg. 111-6 (Nov 2005) ISSN: 1383-875X [Print] Netherlands
• PMID: 16374559 (Publication Type: Case Reports, Journal Article)

Topics

• Body Surface Potential Mapping (methods)
• Child
• Cryosurgery (methods)
• Female
• Humans
• Imaging, Three-Dimensional (methods)
• Pre-Excitation, Mahaim-Type (complications, diagnosis, surgery)
• Surgery, Computer-Assisted (methods)
• Tachycardia, Supraventricular (complications, diagnosis, surgery)
• Treatment Outcome