Key result
A regular wide QRS complex tachycardia during atrial fibrillation in a patient with Wolff-Parkinson-White syndrome was caused by 2:1 AV conduction across a posteroseptal accessory AV connection.
Case Report (n=1)
This case demonstrates that a regular wide QRS complex tachycardia during atrial fibrillation in a WPW patient can result from 2:1 AV conduction over an accessory pathway.
Consider 2:1 accessory pathway conduction in regular wide-complex tachycardia during AF in WPW; leaves open prevalence and requires prospective validation.
We report an unusual case of a relatively regular wide QRS complex tachycardia alternating with periods of an irregular narrow QRS complex tachycardia during atrial fibrillation in a patient with Wolff-Parkinson-White syndrome. Both tachycardias resulted from atrial fibrillation, the wide QRS complex tachycardia being due to 2:1 AV conduction of a type I atrial fibrillation across a posteroseptal accessory AV connection.
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Gatzoulis et al. (1995) conducted a case report in Wolff-Parkinson-White syndrome with atrial fibrillation (n=1). A regular wide QRS complex tachycardia during atrial fibrillation in a patient with Wolff-Parkinson-White syndrome was caused by 2:1 AV conduction across a posteroseptal accessory AV connection.
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