In achalasia cardia, true is -

The pressure is elevated at LES with incomplete relaxation on deglutition. The normal pressure of LES is 13.8 ±4.6 of Hg. In Achlasia it increases to twice normal. Also know Hypertensive Lower esophageal sphincter is another motor disorder distinct from Achalsia here the LES pressure is elevated but it relaxes normally. Peristalsis in the esophageal body is also normal.