An unusual cause of repolarization abnormality after congenital heart surgery: A case report

J Electrocardiol. 2022 May-Jun;72:91-94. doi: 10.1016/j.jelectrocard.2022.03.007. Epub 2022 Mar 26.


We present a case of a young boy who developed persistent tachycardia despite fluid resuscitation, antipyretics, and analgesia after a Fontan procedure. Review of telemetry and ECGs revealed repolarization abnormalities, including the appearance of T-wave alternans, for which an uncommon cause was ultimately identified.

Keywords: Abnormal repolarization; Delta wave; Fasciculoventricular pathway; Hypoplastic left heart syndrome; Ventricular preexcitation.

Publication types

  • Case Reports

MeSH terms

  • Arrhythmias, Cardiac
  • Electrocardiography* / methods
  • Heart Defects, Congenital* / complications
  • Heart Defects, Congenital* / surgery
  • Humans
  • Male