J deflections on ECG in severe hypothermia and hypokalaemia: a case report

ŞENTÜRK T., Ozbek C., Tolga D., Kazazoglu A. R.

NETHERLANDS HEART JOURNAL, vol.21, no.2, pp.106-108, 2013 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 21 Issue: 2
  • Publication Date: 2013
  • Doi Number: 10.1007/s12471-011-0124-2
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.106-108


The J wave, also known as Osborn wave, is a deflection that can be observed on the surface ECG as a late delta wave, seen at the end of the QRS complex. In this case, a 75-year-old woman, after 1 day of continuous haemodialysis, showed a marked hypothermia (28.5A degrees C) and severe hypokalaemia (1.7 mEq/l). Bradycardia was seen on the monitor and J waves were recognised on the ECG recording. After appropriate replacement of potassium and treatment of hypothermia, the J waves disappeared spontaneously.