Journal of Neurogastroenterology and Motility : eISSN 2093-0887 / pISSN 2093-0879

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Fig. 3. Distinction between hypercontractile esophagus (jackhammer; A) and achalasia type III (B) may be based on contraction pattern. Hypercontractile swallows must be premature in achalasia but with a normal distal latency (arrows) in jackhammer cases. Jackhammer waves are frequently multipeaked. Also, they may be discerned by the non-hypercontractile swallows that will show an altered peristalsis in achalasia (aperistalsis) but not in jackhammer cases.
J Neurogastroenterol Motil 2021;27:513~517
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