Korean Circ J.  2016 Jul;46(4):574-579. 10.4070/kcj.2016.46.4.574.

Spontaneous Transition of Double Tachycardias with Atrial Fusion in a Patient with Wolff-Parkinson-White Syndrome

• Kim D
• Lee MY

• KMID: 2344435
• DOI: http://doi.org/10.4070/kcj.2016.46.4.574

Abstract

Among patients with Wolff-Parkinson-White syndrome, atrioventricular reciprocating tachycardia (AVRT) and atrioventricular nodal reentrant tachycardia (AVNRT) can coexist in a single patient. Direct transition of both tachycardias is rare; however, it can occur after premature atrial or ventricular activity if the cycle lengths of the two tachycardias are similar. Furthermore, persistent atrial activation by an accessory pathway (AP) located outside of the AV node during ongoing AVNRT is also rare. This article describes a case of uncommon atrial activation by an AP during AVNRT and gradual transition of the two supraventricular tachycardias without any preceding atrial or ventricular activity in a patient with preexcitation syndrome.

Keyword

Tachycardia, atrioventricular nodal reentry; Tachycardia, reciprocating; Tachycardia, paroxysmal; Tachycardia, supraventricular; Wolff-Parkinson-White syndrome

MeSH Terms

Atrioventricular Node
Humans
Pre-Excitation Syndromes
Tachycardia*
Tachycardia, Atrioventricular Nodal Reentry
Tachycardia, Paroxysmal
Tachycardia, Reciprocating
Tachycardia, Supraventricular
Wolff-Parkinson-White Syndrome*