and 0.2-2.4 cpm range shows bradygastria, 0.07 Hz.-0.15 Hz.
There are two types of dysrhytmia, tachygastria and bradygastria. Tachygastria is an increase in the frequency of normal electrical activity of the stomach (3 cpm).
The high value of this area indicates bradygastria in patients at fasting state.
Dysrhythmia of the stomach includes tachygastria, bradygastria and arrhythmia (shown in table 1), which can be connected with the motor disorder of stomach and corresponding clinical symptoms together in (Shah and Rodriguez, 1999).
Table 1--Frequency zone and its clinical value Components Freq(cpm) Normal 2.0~4.0 Max.freq.of constraction Tachygastria 4.0~9.0 Absence of constractions Bradygastria 0.5~2.0 Controversial Arrhythmias -- Motility disorder Table 2--Main noise sources of EGG signals Components Freq(cpm) Signal 2.0~4.0 0.5~9.0 Noise Respiration 12~24 Small Bowel 9~12 Motion Artifacts Whole Range