[ECG studies during esophagogastroduodenoscopy].

Esophago-gastro-duodenoscopy combined with ECG-monitoring was carried out on a total of 300 patients. In the group of patients with pulmonary, cardiac and vascular damage (102 patients) there was a high incidence of irregularities in the rhythm and repolarization (21.2% and 36.2% resp.) The deviations observed were of a transitory nature and no permanent damage or deaths occurred.