Objective To compare the clinical features and high-resolution esophageal motility-impedance characteristics among esophagogastric junction outflow obstruction(Eoo)patients,typeⅡachalasia(Ach)patients and healthy controls(Con),in order to explore the values of esophageal high-resolution manometry(HRM)in diagnosis and treatment of Eoo patients.Methods Patients with Objective To compare the clinical features and high-resolution esophageal motility-impedance characteristics among esophagogastric junction outflow obstruction (Eoo) patients, type IIachalasia (Ach) patients and healthy controls (Con), in order to explore the values ​​of esophageal high-resolution manometry HRM) in diagnosis and treatment of Eoo patients. Patients Patients with