The characteristic esophageal manometry finding in achalasia cardia is:
Correct Answer: Impaired lower esophageal sphincter relaxation and absent peristalsis
Description: Achalasia is characterized by impaired lower esophageal sphincter (LES) relaxation and absent peristalsis. Esophageal manometry is the most sensitive test to diagnose achalasia. Ref: Harrisons Principles of Internal Medicine, 18th Edition, Page 2431
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