Table 2: Definitions of spectral EGG frequencies.

NormalPeaks in frequencies ranging from 2.0 to 4.0 cpm
Normal with harmonicsPeaks in frequencies ranging from 2.0 to 4.0 cpm with peaks at exact multiples of the fundamental frequency
BradygastriaPeaks in frequencies ranging from 1.0 to 2.0 cpm in absence of a peak in the normal range
Tachygastria Peaks in frequencies ranging from 4.0 to 10.0 cpm in absence of a peak in the normal range
Noise/no signalNo clear peaks, or multiple peaks in the spectrum, strong elevation of the baseline, significant noise or artefacts in the row EGG signal