J Korean Neurol Assoc.
1997 Aug;15(4):921-925.
A case of swallowing syncope with an esophageal tumor
- Affiliations
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- 1Department of Neurology, College of Medicine, Seoul National University Hospital.
Abstract
- Swallowing is a rare cause of syncope. In swallowing syncope, loss of consciousness occurs during or immediately after a swallow. It is mediated via an esophagocardiac vagal reflex arc. The efferent impulse originates in the esophageal sensory endings of the vagus nerve and from the dorsal vagal nucleus an efferent vagus nerve to the heart cause bradycardia or varying degrees of heart block. Bradycardia or heart block in response to swallowing produces decreased cardiac output and results in cerebral hypoperfusion and loss of consciousness. It is occasionally associated with the esophageal or heart disease. The esophageal or heart disease may exaggerate the reflex. We report a patient who had loss of consciousness during swallowig and had a esoophageal submucosal tumor. In EKG monitoring a swallowing induced sinoatrial black was found.
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