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Related Experiment Videos

Gastric pacemakers.

S K Sarna, K L Bowes, E E Daniel

    Gastroenterology
    |February 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    An electronic pacemaker implanted in dogs reversed gastric contractions, delaying both liquid and solid food emptying. This study investigated the impact of altered gastric electrical control activity on digestion.

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    Area of Science:

    • Gastroenterology
    • Physiology
    • Biomedical Engineering

    Background:

    • Gastric electrical control activity (ECA) dictates the sequence of gastric contractions.
    • Normally, ECA propagates aborad, propelling contents distally.
    • Disruptions to this pattern can affect gastric emptying.

    Purpose of the Study:

    • To investigate if reversing ECA phase lag with an electronic pacemaker affects gastric emptying.
    • To determine if altered contraction sequences delay gastric emptying of liquid and solid meals.

    Main Methods:

    • Surgically implanted electronic pacemakers in dogs near the pylorus.
    • Applied electrical stimulation at specific frequencies, pulse widths, and amplitudes.
    • Measured liquid gastric emptying using phenol red and solid emptying via radiological observation.

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    Main Results:

    • Implanted pacemakers reversed the normal aborad direction of gastric contractions.
    • This reversal significantly delayed the gastric emptying of both liquid and solid meals.

    Conclusions:

    • Reversing the direction of gastric electrical control activity can alter contraction patterns.
    • Electronic pacing of the gastric antrum can effectively delay gastric emptying.