The newest iteration of the Chicago Classification, v3.0, was related in 2014 and defines esophageal motility disorders as the following: (1) achalasia types I–III; (2) esophagogastric junction (EGJ) outflow obstruction; (3) major disorders of peristalsis, such as, absent contractility, distal esophageal spasm, and hypercontractile esophagus (jackhammer esophagus); and (4) minor disorders of peristalsis, ineffective esophageal motility (IEM) and fragmented peristalsis. See Table 3 and Fig. 4.1 for full characterization based on high-resolution esophageal manometry parameters.