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- Title
Dual Conduction in a Mahaim Fiber.
- Authors
STERNICK, EDUARDO BACK; SOSA, EDUARDO A.; SCANAVACCA, MAURÍCIO I.; WELLENS, HEIN J.J.
- Abstract
Dual Conduction in a Mahaim Fiber. The case of an 8-year-old girl with incessant nonsustained left bundle branch block-like tachycardia refractory to antiarrhythmic drug therapy is reported. Electrophysiologic study revealed the presence of a right-sided accessory atriofascicular pathway. Episodes of nonsustained tachycardia were found to be based upon a dual response in AV conduction over the Mahaim fiber to one P wave. No reentrant tachycardia could be induced. The arrhythmia was cured by catheter ablation targeting a Mahaim potential at the right lateral tricuspid annulus. The findings can be explained by longitudinal dissociation in a single Mahaim fiber, a fiber distally diverging into two fibers with different conduction times, or (less likely) two closely located Mahaim fibers with different conduction times.(J Cardiovasc Electrophysiol, Vol. 15, pp. 1212-1215, October 2004)
- Subjects
TACHYCARDIA; ARRHYTHMIA; MYOCARDIAL depressants; ELECTROPHYSIOLOGY; CATHETERS; HEART valves
- Publication
Journal of Cardiovascular Electrophysiology, 2004, Vol 15, Issue 10, p1212
- ISSN
1045-3873
- Publication type
Article
- DOI
10.1046/j.1540-8167.2004.04036.x