- The Osborn wave (J wave) is a positive deflection at the J point (negative in aVR and V1)
- It is usually most prominent in the precordial leads
- Characteristically seen in hypothermia (typically T<30C), but they are not pathognomonic.
- J waves may be seen in a number of other conditions:
Typical J Waves
The height of the J wave is roughly proportional to the degree of hypothermia:
Subtle J waves in mild hypothermia (temp 32.5°C)
J waves in moderate hypothermia (temp 30°C)
Marked J waves in severe hypothermia (temp < 27°C)
- ECG BASICS – Waves, Intervals, Segments and Clinical Interpretation
- ECG CLINICAL CASES – Your favourite ECG’s placed in clinical context with a challenging Q&A approach
- ECG and Cardiology Eponymous Syndromes – Cheats guide to eponymous emancipation
- ECG Reference Sites on the WEB – the best of the rest
- Haïssaguerre M, et al. Sudden cardiac arrest associated with early repolarization. N Engl J Med. 2008 May 8;358(19):2016-23. PMID: 18463377.
- Otero J, Lenihan DJ. The “normothermic” Osborn wave induced by severe hypercalcemia. Tex Heart Inst J. 2000;27(3):316-7. PMID: 11093425
- Surawicz B, Knilans T. Chou’s Electrocardiography in Clinical Practice (6th edition), Saunders 2008.
- Wagner, GS. Marriott’s Practical Electrocardiography (11th edition), Lippincott Williams & Wilkins 2007.