In patients suffering from achalasia, the LES (lower esophageal sphincter) remains abnormally closed preventing food and liquids from easily passing into the stomach, especially given weak or even absent esophageal peristalsis. Food is essentially falling by gravity after swallowing . Given the delay in food passage into the stomach, the lower esophagus dilates. Symptoms stem from food failing to clear the LES leading to food regurgitation, difficulty swallowing, and even chest pain. Interesti…