Amaris Manuel A, Sanmiguel Claudia P, Sadowski Daniel C, Bowes Kenneth L, Mintchev Martin P
Division of Gastroenterology, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada.
Dig Dis Sci. 2002 Nov;47(11):2480-5. doi: 10.1023/a:1020503908304.
The stability of EGG recordings is affected by a variety of artifacts. The aim of this study was to investigate possible overlapping of dominant frequencies in recorded cutaneous electrical activity arising simultaneously from the stomach and/or colon. Ten normal volunteers, eight posttotal colectomy patients, and four patients posttotal gastrectomy were studied. Fasting cutaneous recordings were obtained using four pediatric ECG electrodes attached to the abdominal surface. Electrical activity was recorded and digitally analyzed using custom-designed software. Spectral analysis after gastrectomy and colectomy showed persistence of power peaks in the gastric electrical activity range of frequency (2.5-3.75 cpm). In conclusion, noninvasively obtained colonic frequencies overlap EGG. This hypothesis is supported by the persistence of power peaks in the EGG range of frequency after gastrectomy and colectomy. Therefore, we conclude that contribution of electrical activity arising from the colon could substantially affect EGG recordings.
胃电图（EGG）记录的稳定性受多种伪差影响。本研究旨在调查胃和/或结肠同时产生的记录皮肤电活动中主导频率可能存在的重叠情况。对10名正常志愿者、8名全结肠切除术后患者和4名全胃切除术后患者进行了研究。使用四个儿科心电图电极贴于腹部表面获取空腹时的皮肤记录。使用定制软件记录并对电活动进行数字分析。胃切除术后和结肠切除术后的频谱分析显示，在胃电活动频率范围（2.5 - 3.75次/分钟）内功率峰值持续存在。总之，通过非侵入性获得的结肠频率与胃电图重叠。胃切除术后和结肠切除术后在胃电图频率范围内功率峰值的持续存在支持了这一假设。因此，我们得出结论，结肠产生的电活动贡献可能会对胃电图记录产生实质性影响。
