New technologies in the gastrointestinal clinic and research: Impedance and high-resolution manometry

Figure 4 Achalasia subtypes based on manometric patterns of esophageal body contractility. A: Classic achalasia. There is no significant pressurization within the body of the esophagus and there is concurrent impaired EGJ relaxation (IRP of 42 mmHg in this example);Achalasia subtypes based on manometric patterns of esophageal body contractility. B: Achalasia with compression. This subtype exhibits a rapid pan-esophageal pressurization;Achalasia subtypes based on manometric patterns of esophageal body contractility. C: Spastic Achalasia. Although this swallow is associated with rapidly propagated pressurization, the pressurization in this case is attributable to an abnormal lumen obliterating contraction. Modified from: Pandolfino et al[26].