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Related Experiment Videos

Children in sauna: electrocardiographic abnormalities.

E Jokinen1, I Välimäki

  • 1Cardiorespiratory Research Unit, University of Turku, Finland.

Acta Paediatrica Scandinavica
|March 1, 1991
PubMed
Summary

Sauna heat exposure caused temporary ECG changes in children and young adults, similar to sympathetic nervous system activity. A rare sinus arrest highlights potential risks for children with heart rhythm disorders.

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Area of Science:

  • Cardiology
  • Environmental Medicine
  • Pediatrics

Background:

  • Saunas are common in Finland, but their physiological effects on children's cardiovascular systems are not fully understood.
  • Heat stress can significantly impact autonomic nervous system function and cardiac rhythm.

Purpose of the Study:

  • To investigate electrocardiogram (ECG) changes in children and young adults exposed to controlled heat stress simulating a Finnish sauna.
  • To assess the transient and potentially risky cardiovascular effects of sauna bathing in pediatric populations.

Main Methods:

  • ECG monitoring was performed on 81 children and 20 adolescents/young adults in a climatic chamber simulating sauna conditions.
  • Data were collected during heat exposure and a subsequent recovery period.

Main Results:

  • 57% of subjects showed ECG changes consistent with increased sympathetic activity during heat exposure, and 23% during recovery.
  • Transient arrhythmias, including extrasystoles, were observed in a small number of children.
  • One case of a 3.3-second sinus arrest with reversible junctional rhythm occurred in a 5-year-old girl with a pre-existing condition.

Conclusions:

  • Sauna-induced heat stress causes transient, generally benign ECG changes in children and young adults.
  • The observed sinus arrest indicates that significant heat stress in saunas can pose risks, particularly for children with sinoatrial node disorders.

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