Hypothermia can cause J waves, or Osborn waves, bradycardia, a prolonged QT, and motion artifact from shivering.
Hypothermia

Examples

Hypothermia
Osborn waves, bradycardia, and prolonged QT all due to hypothermia.
Hypothermia
Atrial fibrillation and Osborn waves characteristic of hypothermia.
Hypothermia
Osborn waves can mimic ST-segment elevation as was the case with this post-arrest ECG. Slow atrial fibrillation is another hallmark of hypothermia. The core temperature was 76 deg F (24.4 deg C).
Hypothermia
Osborn waves and bradycardia in a patient who's core temperature was 81.1 deg F (27.3 deg C).References
- Doshi HH, Giudici MC. The EKG in hypothermia and hyperthermia. Journal of Electrocardiology. 2015;48(2):203-209.