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Relationship between surface electrogastrography and antropyloric pressures

W M Sun1, A Smout, C Malbert

  • 1Gastroenterology Unit, Royal Adelaide Hospital, University of Adelaide, South Australia.

The American Journal of Physiology
|March 1, 1995
PubMed
Summary
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The cutaneous electrogastrogram (EGG) measures gastric electrical activity. EGG frequency correlates with intraluminal pressure waves, particularly after erythromycin administration, indicating its utility in assessing gastric motility.

Area of Science:

  • Gastroenterology
  • Physiology
  • Medical Devices

Background:

  • The interdigestive motor complex plays a crucial role in gastric motility.
  • Cutaneous electrogastrogram (EGG) is a non-invasive method to assess gastric electrical activity.
  • Understanding the relationship between EGG and intraluminal pressures is vital for diagnosing motility disorders.

Purpose of the Study:

  • To investigate the relationship between cutaneous electrogastrogram (EGG) frequency and intraluminal antropyloroduodenal pressures during different physiological states.
  • To evaluate the effect of triglyceride infusion and erythromycin on EGG and pressure wave activity.

Main Methods:

  • Simultaneous recording of cutaneous electrogastrogram (EGG) and intraluminal antropyloroduodenal pressures in 12 healthy volunteers.

Related Experiment Videos

  • Recordings were performed during phase II of the interdigestive motor complex, during intraduodenal triglyceride infusion, and after intravenous erythromycin administration.

    • Main Results:

    • EGG frequency during phase II (0.046 Hz) was higher than antral pressure waves (1.8 cpm).
    • Triglyceride infusion suppressed antral waves but did not alter EGG frequency, though EGG and pyloric waves showed comparable frequencies.
    • Erythromycin decreased EGG frequency (0.03 Hz) to match antral pressure waves, establishing a strong 1:1 correlation between pressure waves and EGG signals.

    Conclusions:

    • Cutaneous electrogastrogram (EGG) frequency closely reflects intraluminal antropyloroduodenal pressure waves, especially after erythromycin.
    • The temporal relationship between EGG and pressure waves varies depending on the physiological condition, becoming strongly correlated during triglyceride infusion and after erythromycin treatment.