Dictionary.net

a spasm of the cardiac sphincter (between the esophagus and the stomach); if the cardiac sphincter does not relax during swallowing the passage of food into the stomach is obstructed

a spasm of the cardiac sphincter (between the esophagus and the stomach); if the cardiac sphincter does not relax during swallowing the passage of food into the stomach is obstructed

Disorder of lower esophagogastric motility due to failure of the lower esophageal sphincter to relax with swallowing. It is sometimes caused by degeneration of the ganglion cells of the myenteric plexus or of the vagal motor nuclei.

Spasmodic action of the heart.

Spasmodic contraction of the cardiac end of the stomach.