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August 2017; 7 (4) Research

Swallow-induced syncope in 5 patients

Electrophysiologic evaluation during swallowing

Ibrahim Aydogdu, Can Hasdemir, Ahmet Acarer, Sezin Alpaydin, Cumhur Ertekin
First published June 22, 2017, DOI: https://doi.org/10.1212/CPJ.0000000000000376
Ibrahim Aydogdu
Departments of Neurology and Clinical Neurophysiology (IA, CE), Cardiology (CH), and Neurology (AA, SA), Ege University, Bornova/Izmir, Turkey.
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Can Hasdemir
Departments of Neurology and Clinical Neurophysiology (IA, CE), Cardiology (CH), and Neurology (AA, SA), Ege University, Bornova/Izmir, Turkey.
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Ahmet Acarer
Departments of Neurology and Clinical Neurophysiology (IA, CE), Cardiology (CH), and Neurology (AA, SA), Ege University, Bornova/Izmir, Turkey.
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Sezin Alpaydin
Departments of Neurology and Clinical Neurophysiology (IA, CE), Cardiology (CH), and Neurology (AA, SA), Ege University, Bornova/Izmir, Turkey.
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Cumhur Ertekin
Departments of Neurology and Clinical Neurophysiology (IA, CE), Cardiology (CH), and Neurology (AA, SA), Ege University, Bornova/Izmir, Turkey.
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Citation
Swallow-induced syncope in 5 patients
Electrophysiologic evaluation during swallowing
Ibrahim Aydogdu, Can Hasdemir, Ahmet Acarer, Sezin Alpaydin, Cumhur Ertekin
Neurol Clin Pract Aug 2017, 7 (4) 316-323; DOI: 10.1212/CPJ.0000000000000376

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Abstract

Background: We sought to characterize a cohort of participants with swallow-induced syncope (SIS) with clinical and electrophysiologic evaluations.

Methods: Using electrocardiographic monitoring and neurophysiologic methods of swallowing, we evaluated a cohort of 5 patients with SIS, 4 of whom had longitudinal follow-up.

Results: We determined electrophysiologically that the duration between the onset of swallow and a bradyarrhythmia or asystole is extremely short (2–3 seconds) in SIS. Most participants with SIS do not have a neurologic or esophageal disorder. SIS can occur with different food types, in sitting or standing position, and has varying frequency in different participants. Permanent pacemaker placement is a curative measure in SIS.

Conclusions: Our findings suggest that SIS is elicited by reflex afferent pathways originating in the oropharynx, rather than an esophageal origin, as previously proposed. Our longitudinally followed cohort with detailed clinical and electrophysiologic characterization should aid the clinician in the diagnosis and treatment of this potentially life-threatening condition.

Footnotes

  • Funding information and disclosures are provided at the end of the article. Full disclosure form information provided by the authors is available with the full text of this article at Neurology.org/cp.

  • Supplemental data at Neurology.org/cp

  • Received February 17, 2017.
  • Accepted April 17, 2017.
  • © 2017 American Academy of Neurology
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