The Brockenbrough (BB) procedure is becoming the necessary procedure for radiofrequency ablation for supravalvular tachycardia in patients after a Fontan procedure. We experience Fontan-rout to aorta communication caused by the BB procedure. The communication was successfully occluded using a detachable coil. This complication was rare but could still happen as an increasing necessity of the catheter ablation in patients with a Fontan procedure. Coil embolization is a potential option for recovery from this complication. © 2015 Wiley Periodicals, Inc.