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[Relation between electrogastrography and gastric electromyogram, mechanical activity]

T Kajimoto1

  • 1Department of Surgery (II), Jikei University School of Medicine, Tokyo, Japan.

Journal of Smooth Muscle Research = Nihon Heikatsukin Gakkai Kikanshi
|June 1, 1995
PubMed
Summary

Electrogastrography (EGG) noninvasively measures gastric motility. This study clarifies EGG meanings, correlating its signals with gastric electrical and mechanical activity in dogs, aiding its clinical interpretation.

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Area of Science:

  • Gastroenterology
  • Physiology
  • Medical Instrumentation

Background:

  • Electrogastrography (EGG) is a noninvasive technique for assessing gastric motility.
  • The precise meaning of EGG signals in relation to gastric electrical and mechanical activity requires clarification.

Purpose of the Study:

  • To elucidate the meaning of electrical activity recorded by EGG concerning gastric motility.
  • To establish the correlation between EGG signals and direct measurements of gastric electrical and mechanical activity.

Main Methods:

  • EGG was recorded using cutaneous electrodes in anesthetized and conscious dogs.
  • Gastric electromyogram (EMG) via serosal electrodes and mechanical activity via strain gauge transducer were simultaneously recorded.
  • Data were analyzed during both digestive and interdigestive states, including specific phases of the interdigestive cycle.

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Main Results:

  • EGG amplitude significantly correlated with gastric EMG and mechanical activity amplitude in the antrum during the digestive state (p < 0.01).
  • During the interdigestive state, EGG amplitude showed significant correlation with gastric EMG and mechanical activity in phase 2 (p < 0.01).
  • EGG reflected electrical control activity (ECA) and electrical response activity (ERA), correlating with gastric antrum activity.

Conclusions:

  • EGG is a valuable noninvasive method for evaluating gastric motility.
  • EGG signals directly reflect gastric electrical and mechanical activity, particularly antral activity.
  • The amplitude of EGG is a reliable indicator of gastric electrical and mechanical activity during specific states and phases.