International Journal of Arrhythmia  2017;18(3):151-154

doi:10.18501/arrhythmia.2017.025

Preexcitation Syndrome with a Mahaim-type Accessory Pathway.

Kwang No LEE 1 ; Young Hoon KIM

Affiliations

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Keywords

Mahaim Fiber; Wide QRS complex Tachycardia; Left Bundle Branch Block; Preexcitation Syndrome

Country

Republic of Korea

Language

English

Abstract

Wide QRS complex tachycardia with a left bundle branch block pattern can be caused by supraventricular tachycardia with aberrant conduction, preexcitation syndrome mediated through a right-sided accessory pathway, and/or ventricular tachycardia. The use of atrial pacing maneuvers can be beneficial for unmasking minimal preexcitation to differentiate between these conditions. Here, we report a case of successful radiofrequency catheter ablation of a Mahaim fiber in a patient with wide QRS complex tachycardia.