Efficacy of a pure Ikr blockade with nifekalant in refractory neonatal congenital junctional ectopic tachycardia and careful attention to damaging the atrioventricular conduction during the radiofrequency catheter ablation in infancy - Hisaaki Aoki, MD, PhD; Tsugutoshi Suzuki, MD, PhD; Hikoro Matsui, MD, PhD; Satoshi Yasukochi, MD; Hirofumi Saiki, MD, PhD; Hideaki Senzaki, MD, PhD; Yoshihide Nakamura, MD (HeartRhythm Case Reports, 2017)