We were very interested by the article of Pyörálá et al. (Electrocardiographic changes during Gastroscopy, Endoscopy 5 [1973] 186.Since we have recently completed a similar study we would like to comment on several points and briefly report our results.Continuous electrocardiographic recording on tape (Holter system 3) was performed in 52 patients undergoing a gastro-duodenoscopy. The procedure was always performed by the same investigator with a fiberscope (panendoscope ACMI). None of the patients Downloaded by: Chinese University of Hong Kong. Copyrighted material.
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