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J-wave change during rewarming therapy for accidental hypothermia
Satoshi Maeda1,2, Ichitaro Abe3, Hirofumi Zaizen2
1Department of Cardiology Miyazaki Zenjinkai Hospital Miyazaki Japan.
Acute Medicine & Surgery
|January 29, 2021
Summary
Accidental hypothermia can cause prominent J waves on electrocardiograms (ECGs). Continuous ECG monitoring during rewarming therapy revealed J waves decrease as body temperature normalizes.
Area of Science:
- Cardiology
- Internal Medicine
- Emergency Medicine
Background:
- J waves are abnormal electrocardiogram (ECG) findings representing QRS-ST junction elevation.
- Hypothermia is linked to fetal arrhythmias and increased J-wave manifestation.
Observation:
- A 68-year-old woman with hypothermia presented with prominent J waves on ECG.
- Continuous ECG monitoring during rewarming showed decreasing J-wave amplitude as body temperature increased.
- J waves eventually disappeared with normalized body temperature.
Findings:
- Core body temperature directly correlates with J-wave amplitude in hypothermia.
- No fatal arrhythmias were observed during the rewarming process.
Implications:
- Serial ECG monitoring is crucial for patients with severe hypothermia.
- Understanding J-wave dynamics aids in managing hypothermia patients and assessing cardiac risk.
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