Slow Pathway Modification in a Patient with D-Transposition of the Great Arteries and Atrial Switch Procedure.

Patients with systemic right ventricles are often not able to tolerate frequent, rapid, or incessant atrial arrhythmias without developing significant symptoms and ventricular dysfunction. Atrial arrhythmias are associated with an increased risk of ventricular arrhythmias and sudden cardiac death. Rhythm disturbances must be aggressively addressed in this population with frequent screening, follow-up, and treatment.