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High resolution ECG changes among Finnish pilots

E J Hyvämäki1, J U Grönlund, T H Metsälä

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

Aviation, Space, and Environmental Medicine
|March 1, 1996
PubMed
Summary

High-resolution ECG (HR-ECG) can detect cardiac arrhythmia risk. This study found age and height significantly impact filtered QRS duration in pilots, while glucose levels correlate with late potentials.

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Area of Science:

  • Cardiology
  • Aerospace Medicine

Background:

  • Late potentials detected by high-resolution ECG (HR-ECG) are indicators of cardiac arrhythmia risk.
  • Evaluating these potentials in pilots is crucial for aviation safety.

Purpose of the Study:

  • To assess normal and abnormal late potentials in Finnish pilots.
  • To identify factors influencing these cardiac electrophysiological parameters.

Main Methods:

  • 168 healthy male pilots underwent standard 12-lead ECG and filtered HR-ECG.
  • Key parameters measured included root-mean-square voltage in the terminal 40 ms (RMS40), total filtered QRS duration (FQRSD), and high-frequency, low-amplitude signal duration (HFLAD).

Main Results:

  • Age and height significantly correlated with FQRSD (p < 0.005), but not RMS40 or HFLAD.

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  • Mean values: RMS40 = 35.3 ± 15.4 µV, FQRSD = 114.6 ± 6.8 ms, HFLAD = 31.0 ± 7.9 ms.
  • Fasting blood glucose positively correlated with HFLAD; smoking showed a trend towards longer HFLAD.

    • Conclusions:

    • Pilot age and height are significant determinants of total filtered QRS duration.
    • While certain physiological parameters influence late potentials, further research is needed to fully understand their clinical significance in aviators.