Atrioventricular Nodal Reentrant Tachycardia in Children: Effect of Slow Pathway Ablation on Fast Pathway Function

Abstract

Lack of clear dual AV node physiology is common in pediatric patients with inducible AVNRT (38%). Fast pathway effective refractory period shortens substantially in response to slow pathway ablation. The magnitude of change is large compared with adult reports and is not completely explained by changes in autonomic tone. Prospective studies in children using autonomic blockade are needed.