Catheter Interruption of Atrioventricular Conduction Using Radiofrequency Energy in a Patient with Transposition of the Great Arteries

Percutaneous catheter mapping andradiofrequency ablation of the AV node‐His bundle system (with subsequent transvenous endocardial ventricular pacing) were performed on an 18‐year‐old woman with transposition of the great arteries and intact ventricular septum and chronic arrhythmias 15 years following a Mustard operation. Exclusion of the AV conduction tissue from the systemic venous circulation by the complex anatomy and the Mustard repair was circumvented by a retrograde approach across the aortic valve to the morphological right ventricle yielding access to the AV node‐His bundle system.