Andersen-Tawil syndrome is an uncommon inherited autosomal disorder 
characterized by a prolonged QT interval, periodic paralysis, and dysmorphic 
features. The deleterious effects of cardioplegia on periodic paralysis and 
cardiac arrhythmia are unknown, and no studies have reported the performance of 
cardiac surgery in patients with Andersen-Tawil syndrome. We present a case of 
successful cardiac surgery in a patient with Andersen-Tawil syndrome, without 
using cardioplegia.