macological therapy, non-pharmacological treatments, such as catheter ablation or implantation of a cardioverter defibrillator, are an option for adult patients. 3,4 However, non-pharmacological approaches are sometimes difficult in some types of CHD, or after surgical procedures for anatomical reasons in children. 2,5 Amiodarone and nifeka-V arious tachyarrhythmias may occur after surgical repair of congenital heart disease (CHD) and they may be potentially fatal. 1,2 Following onset, emergency therapy to control and terminate the tachycardia, and to prevent circulatory deteriorations, is usually mandatory. In patients with tachyarrhythmia resistant to phar-