Figure 14 - Failed deglutitive inhibition in diffuse esophageal spasm.

The tracing depicts simultaneous esophageal body contractions to repeated swallows at 5-second intervals. Normally, esophageal body contractile activity is inhibited with repetitive swallows with a peristaltic sequence following the final swallow. (Source: Behar and Biancani¹⁰⁸ with permission from American Gastroenterological Association.)