Key result
Radiofrequency catheter ablation successfully eliminated the left free wall accessory pathway and modulated the slow pathway in a patient with rare spontaneous transition between AVNRT and AVRT.
Case Report (n=1)
No
This case report documents a rare spontaneous transition between AVRT and AVNRT with atrial fusion in a patient with Wolff-Parkinson-White syndrome.
May guide ablation in rare AVNRT-AVRT transitions; hypothesis-generating and leaves open broader applicability.
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.
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Kim et al. (2016) conducted a case report in Wolff-Parkinson-White Syndrome (n=1). Radiofrequency catheter ablation was evaluated on Successful ablation of the accessory pathway and slow pathway modulation. Radiofrequency catheter ablation successfully eliminated the left free wall accessory pathway and modulated the slow pathway in a patient with rare spontaneous transition between AVNRT and AVRT.
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