title: An uncommon case of spontaneous conversion from AV re-entry tachycardia to AV nodal re-entry tachycardia in a patient with dual tachycardia.
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.
authors.affiliation: Department of Cardiology and Electrophysiology, Sestre milosrdnice University Hospital Centre, Zagreb, Croatia.
authors.forename: Ivan
authors.initials: I
authors.lastname: Zeljković
authors.affiliation: Department of Cardiology and Electrophysiology, Sestre milosrdnice University Hospital Centre, Zagreb, Croatia.
authors.forename: Ivica
authors.initials: I
authors.lastname: Benko
authors.affiliation: Department of Cardiology and Electrophysiology, Sestre milosrdnice University Hospital Centre, Zagreb, Croatia.
authors.forename: Šime
authors.initials: Š
authors.lastname: Manola
authors.affiliation: Department of Cardiology and Electrophysiology, Sestre milosrdnice University Hospital Centre, Zagreb, Croatia.
authors.forename: Vjekoslav
authors.initials: V
authors.lastname: Radeljić
authors.affiliation: Department of Cardiology and Electrophysiology, Sestre milosrdnice University Hospital Centre, Zagreb, Croatia.
authors.forename: Nikola
authors.initials: N
authors.lastname: Pavlović