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The aim of the study was an evaluation of ECG changes during endoscopy. In 57 hospitalized patients (34 female, 18 male, mean age 54) who had gastroscopy (n = 23), endoscopic retro-cholangiopancreatography (ERCP) (n = 17) or colonoscopy (n = 17) two hours before and two hours after the examination, an ECG monitoring by Holter method was done. The patients also filled a questionnaire to measure their level of anxiety. Arrhythmias and ST depression/elevation were seen in 37 (65%) patients during endoscopy. In 12% complex arrhythmias (III, IV A and IV B type Lown) were recorded. Complex arrhythmias and/or horizontal ST depression greater than 1 mm were observed more frequently (p less than 0.01) in the group of patients with clinically evident diseases of the cardiovascular system; this group was older than the group without cardiac symptoms. There was no correlation between ECG changes and the level of anxiety before the examination. During ERCP ECG changes were more complex than during colonoscopy (p less than 0.01) or gastroscopy (p less than 0.05).
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