Figure 3.

Manometry results in achalasia: increased resting tone of LES with absence of relaxation on swallowing and simultaneous contractions of the tubular esophagus; “W” indicates a wet swallow. The manometry probe can measure the amplitude of esophageal contractions at three different locations in the tubular esophagus (top three sections); the bottom section provides a direct representation of the region of the lower esophageal sphincter (absence of relaxation). The y-axis shows the pressure in mm Hg, and the x-axis the time in second