Successful ablation of a superior fast-slow atrioventricular reentrant tachycardia in a patient with congenitally corrected transposition of great arteries

Congenitally corrected transposition of the great arteries (ccTGA) is a rare defect characterized by a combination of atrioventricular (AV) and ventriculoarterial (VA) discordance. 1 ccTGA is associated with various arrhythmias, such as atrioventricular reciprocating tachycardia (AVRT), intra-atrial reentrant tachycardia, and atrioventricular nodal reentrant tachycardia (AVNRT). 2, 3 The I, D, D (I, D, D-situs inversus, D-loop, D-transposition) subtype of ccTGA, which is the least prevalent, is frequently associated with AVNRT because of an abnormal conduction system.