Automated high-speed analysis of gastrointestinal myoelectric activity

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Abstract
The value of myoelectric recording in the gastrointestinal tract was limited by the difficulty of analyzing the prolonged recordings which were required to demonstrate integrated physiological activity. This problem was solved by the use of a tape recording system with accelerated replay, originally developed for cardiac monitoring. Rapid replay not only reduced the time required for data retrieval but increased the frequency of the recorded signals to allow electronic separation of fast and slow wave activity for on-line conversion into digital pulses suitable for computer analysis. The technique was illustrated by the analysis of an imperfect prolonged multichannel recording of dog gastrointestinal myoelectric activity, demonstrating some of the possibilities for data analysis and error detection inherent in the system.