Clinical features and long-term outcomes of lower esophageal sphincter-dependent and lower esophageal sphincter-independent jackhammer esophagus.

Background: The most recent Chicago Classification expanded the criteria for diagnosis of jackhammer esophagus (JHE) to include the distal contractile integral (DCI) of the lower esophageal sphincter (LES). The clinical impact of the manometric inclusion of LES hypercontractility remains unclear. We aimed to analyze the clinical features and long-term outcomes of measured LES-dependent (LD-JHE) and LES-independent (LI-JHE) jackhammer esophagus.