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[Electrocardiographic changes in accidental hypothermia].

R Póvoa1, J B Arroyo, C Ferreira

  • 1Hospital Municipal Arthur Ribeiro de Saboya.

Arquivos Brasileiros De Cardiologia
|January 1, 1992
PubMed
Summary
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Accidental hypothermia causes significant electrocardiogram (ECG) changes, notably Osborn waves. These ECG alterations correlate with core body temperature, aiding in hypothermia assessment.

Area of Science:

  • Cardiology
  • Internal Medicine
  • Emergency Medicine

Background:

  • Accidental hypothermia presents diagnostic challenges, requiring precise monitoring of physiological parameters.
  • Electrocardiography (ECG) is a critical tool for assessing cardiac function in hypothermic patients.

Observation:

  • This study analyzed ECGs from 32 patients with accidental hypothermia.
  • Key parameters assessed included cardiac arrhythmias, QRS configuration, ST-T segment, and T wave alterations.
  • Simultaneously, core temperature, pH, and electrolyte levels (Na+, K+, Cl-) were measured.

Findings:

  • Over 90% of patients exhibited ECG abnormalities.
  • Osborn waves were present in all patients (28/28).
  • Other common findings included sinus bradycardia (11/32), prolonged QT intervals (24/32), and altered T waves, with J wave amplitude negatively correlating with core temperature.

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Implications:

  • Hypothermia-induced ECG changes, particularly Osborn waves, serve as important diagnostic markers.
  • ECG findings can provide insights into the severity of hypothermia and electrolyte imbalances.
  • Further research can refine ECG's role in managing hypothermia patients.