- Reflux of stomach acid into the esophagus.
1954, Annals of internal medicine, volume 41, page 561:
- Further, in cases of hiatus hernia acid reflux was found both with and without esophagitis.
- Heartburn, especially recurring or chronic heartburn.
1965, Clinical surgery, volume 5, page 374:
- Heartburn and acid reflux are the next commonest symptoms.