抄録
Electrogastrography (EGG) was performed in 15 healthy female subjects with a mean age of 22.0 ±4.1 for an 8-hour period under supine position. To evaluate the dynamic nature of gastric activity, we extracted the following parameters every 1 minute interval: 1) EGG period, 2) EGG amplitude, which was estimated by the least-squares-cosine spectrum method; and 3) the ratio of periodic gastric activity during monitoring. In 15 subjects, the mean value of the EGG period was 20.4 ± 0.6 sec. In 15 subjects, the mean value of the ratio of periodic gastric activity was 79 ± 10%. In 11 (73%) subjects, 90-minute rhythm was observed in time-sequential array of gastric amplitude. Significant decrease of EGG amplitude was observed between 13:00-14:00. EGG might be a useful quantitative and non-invasive method for evaluating the ultradian rhythm of gastric activity.
