Table 2.

Definitions of spectral EGG frequencies.

Normal	Peaks in frequencies ranging from 2.0 to 4.0 cpm
Normal with harmonics	Peaks in frequencies ranging from 2.0 to 4.0 cpm with peaks at exact multiples of the fundamental frequency
Bradygastria	Peaks 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 signal	No clear peaks, or multiple peaks in the spectrum, strong elevation of the baseline, significant noise or artefacts in the row EGG signal