Figure 4:

2D pressure profile of the esophago-gastric junction (EGJ) from of controls and 3 achalasia patients at end-expiration (EE) and forced inspiration (FI). Note the shape of the pressure profile is relatively uniform with the longer side located along the lesser curvature of the stomach and shorter side towards the greater curvature. With FI, the pressure increase is located at the proximal (cranial) part of the high pressure zone. In patients with achalasia esophagus the pressure profile is deformed at both, end-expiration and forced inspiration.