[Myoelectric gastric activity using cutaneous electrogastrography--electrogastrogram].
Cutaneous electrogastrography was performed in nine healthy volunteers and in 43 patients presenting with various clinical conditions known to be associated with gastric motor disorders, including: 24 with functional dyspepsia, nine with longstanding diabetes mellitus, five with recent nausea/vomiting, three with pyloric stenosis, one with post-vagotomy gastroparesis, and one with idiopathic gastric distension and atony. The electrogastrography signal was recorded during 1h pre-prandial period and 1h after eating. The electrogastrography dominant frequency and power were determined using running spectral frequency analysis and the time-course of electrogastrography was evaluated in a pseudo three dimensional graphic. The electrogastrography dominant frequency was divided into four bands: 1. Bradygastria (0-2.4 cpm); 2. Normal (2.4-3.9 cpm); 3. Tachygastria (4.0-9.9 cpm); 4. Duod-resp (10.0-15.0 cpm). The percentage of the dominant electrogastrography power into those four frequency bands was determined. Electrogastrography was considered normal if functional dyspepsia was normal in more than 65% of the time. The electrogastrography was normal (dominant frequency into 3 cpm range in > 65%) in: 9/9 healthy volunteers, 3/3 pyloric stenosis, 4/5 nausea/vomiting, 3/9 diabetes mellitus, 13/24 functional dyspepsia. Gastric dysrhythmias were present in > 35% of the electrogastrography recording in: 1/5 nausea/vomiting, 11/24 functional dyspepsia, 6/9 diabetes mellitus, 1/1 post-vagotomy gastroparesis, 1/1 gastric distension and atony. Persistent tachygastria (> 10%) was found in: 1/1 gastric distension and atony (90% electrogastrography), 1/1 post-vagotomy gastroparesis, 1/5 nausea/vomiting, 6/9 diabetes mellitus, 6/24 functional dyspepsia. It was concluded that electrogastrography is a non-invasive, well-tolerated, reliable means of recording gastric myoelectric activity and gastric dysrhythmias. Patients presenting with gastric motor disorders, with chronic dyspeptic symptoms, or acute nausea may present transitory or persistent gastric dysrhythmias.
Serviço de Gastroenterologia do Hospital, Universidade Federal de Goiás, Goiânia, GO.
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Rezende-Filho
D000293:Adolescent; D000328:Adult; D004568:Electrodiagnosis / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D005769:Gastrointestinal Motility; D006801:Humans; D008297:Male; D012867:Skin; D013272:Stomach Diseases / Q000175:diagnosis* / Q000503:physiopathology
Estudo da atividade mioelétrica gástrica por eletrogastrografia cutânea--eletrogastrograma.