Abstract
A child with Wolff-Parkinson-White syndrome showed large right atrial diverticulum overlying the right ventricle and the right coronary artery at CT angio with right atrial appendage as a separate structure. The accessory pathway was located at the diverticulum. Catheter ablation was not regarded feasible and surgery was indicated. A broad muscular connection between the right atrium and ventricle was interrupted by transsection and cryoablation as confirmed by disappearance of preexcitation. This precisely CT documented case represents a rarely reported right atrial diverticulum posing a high risk of life-threatening arrhythmias.
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