[Electromyographic study on the propagation mechanism of canine gastric electrical activity (author's transl)].

In order to clarify the propagation mechanism of the canine gastric basic electrical rhythm (BER), a complete transection-reanastomosis was done in the lower corpus, corpus-antrum junction or middle pyloric antrum in each group of 3 dogs which had been equipped with 4 bipolar electrodes. At the time of the transection-reanastomosis, 4 pacing electrodes were also implanted. The BER frequency in the preanastomosis, 4 pacing electrodes were also implanted. The BER frequency in the preanastomosis remained unchanged regardless of the site of transection-reanastomosis, while that in the postanastomosis was markedly reduced, but gradually recovered to show the synchronization with the BER in the preanastomosis. Pacing of the gastric BER in the early stage (about 10 days post op.) when the synchronization was noted, was not established through anastomosis. However, pacing in the late stage (about 30 days post op.) was established through an astomosis. Dysrhythmia in the postanastomosis were observed to occur in high incidence in the early postoperative period, but subsequently declined to the same incidence as in the controls. Therefore, the synchronized phenomenon is due partly to the recovery of the inherent automatism of the gastric wall and due to subsequent propagation of the BER through anastomosis. Dysrhythmia in the postanastomosis were of temporal occurrence.