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. 2004 May;12(5):226-229.

Coexistence of a bradycardia- and tachycardia-dependent bundle branch block

H M M Al Hashimi, A J J van Es, T Szili-Torok, M Gardien, G P Molhoek, P M J Verhorst

Coexistence of a bradycardia- and tachycardia-dependent bundle branch block

H M M Al Hashimi et al. Neth Heart J. 2004 May.

Abstract

Aberrant ventricular conduction is a rare phenomenon as compared with the more frequently occurring antrioventricular conduction disturbances. It leads to widening of the QRS complex, which is either due to a complete or functional block in one of the bundle branches or a block within the intramyocardial conduction system itself. Mechanisms that are potentially involved in the genesis of aberrant ventricular conduction are sudden shortening of cycle length (tachycardia-dependent phase III), antegrade block with retrograde concealed conduction, or bradycardia-dependent block (enhanced phase IV). In this paper, we present a patient with aberrant ventricular conduction with the occurrence of a tachycardia-dependent, as well as a bradycardia-dependent bundle branch block, which is an even rarer phenomenon.

Keywords: bradycardia-dependent; bundle branch block; mechanism; tachycardia-dependent.

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