Journal
AMERICAN JOURNAL OF PHYSIOLOGY-GASTROINTESTINAL AND LIVER PHYSIOLOGY
Volume 284, Issue 6, Pages G956-G962Publisher
AMER PHYSIOLOGICAL SOC
DOI: 10.1152/ajpgi.00477.2002
Keywords
low-frequency; long-pulse gastric electrical stimulation; high-frequency; short-pulse gastric electrical stimulation
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This study determined the most efficient parameters of low-frequency/ long-pulse gastric electrical stimulation (GES) required to entrain gastric slow waves and also evaluated the effect of entrainment and high-frequency, short-pulse GES on gastric electrical activity (GEA). Nine dogs were fitted with stimulation wires along the greater curvature. Entrainment was observed in six or seven animals, with long-pulse GES at six cycles per minute (cpm), at various combinations of current and pulse width and was directly related to the energy delivered. Entrainment was observed in four to seven animals, with GES at 12 cpm, and the maximal driven frequency was 6 cpm. Entrainment did not significantly increase the dominant power of GEA. High-frequency, short-pulse GES, using pulse trains of 14 Hz, 5 mA, and 330 mus, with 0.1 s on and 5 s off, and pulse trains of 40 Hz, 10 mA, and 330 mus, with 2 s on 3 s off, did not affect variables of GEA. We conclude that acute low-frequency GES but not high-frequency, short-pulse GES can entrain slow waves; the power of slow waves is not affected by either type of stimulation.
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