In this disease, the muscle at the bottom of the esophagus does not open to release food into the stomach. Food collects in the esophagus instead of moving into the stomach.
A disorder of the esophagus in which the lower esophageal sphincter does not relax. The lower esophageal sphincter (LES) is continuously contracted resulting in chest pain and symptoms of heartburn. This causes dilation of the esophagus as well as difficulty passing food into the stomach.
A condition characterised by lack of normal relaxation of the valve at the lower end of the gullet, which should occur during swallowing