An uncommon case of spontaneous conversion from AV re-entry tachycardia to AV nodal re-entry tachycardia in a patient with dual tachycardia

Ivan Zeljković; Ivica Benko; Šime Manola; Vjekoslav Radeljić; Nikola Pavlović

doi:10.1016/j.ipej.2016.02.001

An uncommon case of spontaneous conversion from AV re-entry tachycardia to AV nodal re-entry tachycardia in a patient with dual tachycardia

Indian Pacing Electrophysiol J. 2016 Feb 12;15(5):245-8. doi: 10.1016/j.ipej.2016.02.001. eCollection 2015 Sep-Oct.

Authors

Ivan Zeljković¹, Ivica Benko¹, Šime Manola¹, Vjekoslav Radeljić¹, Nikola Pavlović¹

Affiliation

¹ Department of Cardiology and Electrophysiology, Sestre milosrdnice University Hospital Centre, Zagreb, Croatia.

Abstract

We report the case of a 46-year old patient in whom an electrophysiology study (EP) was performed due to paroxysmal supraventricular tachycardia documented in 12-lead ECG. During the EP study, supraventricular tachycardia was induced easily and it corresponded to orthodromic AV reentry tachycardia (AVRT) using a concealed left free wall accessory pathway. However, during the study AVRT spontaneously and repeatedly converted to the typical slow-fast AV node reentry tachycardia (AVNRT). Both accessory and AV nodal slow pathways were ablated, due to the finding that both AVRT and AVNRT were independently inducible during the EP study.