Corrections Gastroenterology Volume 116, Issue 4, (April 1999)   Gastroenterology  Volume 116, Issue 4, (April 1999) DOI: 10.1016/S0016-5085(99)70112-5 Copyright © 1999 Terms and Conditions

Fig. 7 Ultrasound analysis of esophageal muscle thickness during (A) negative and (B) positive edrophonium tests. The baseline muscle thickness is represented by the horizontal dotted line. Peaks in muscle thickness are voluntary 5-mL water swallows performed every 60 seconds. (A) Sustained increase in esophageal muscle thickness is not observed in a subject who had no chest pain after edrophonium injection. (B) In contrast, the ultrasound record of a subject whose chest pain was reproduced 72 seconds after injection of edrophonium shows a sustained increase in esophageal muscle thickness preceding the onset of pain. Gastroenterology 1999 116, DOI: (10.1016/S0016-5085(99)70112-5) Copyright © 1999 Terms and Conditions