Glossopharyngeal insufflation induces cardioinhibitory syncope in apnea divers

Item Type:	Article
Title:	Glossopharyngeal insufflation induces cardioinhibitory syncope in apnea divers
Creators Name:	Dzamonja, G. and Tank, J. and Heusser, K. and Palada, I. and Valic, Z. and Bakovic, D. and Obad, A. and Ivancev, V. and Breskovic, T. and Diedrich, A. and Luft, F.C. and Dujic, Z. and Jordan, J.
Abstract:	Apnea divers increase intrathoracic pressure voluntarily by taking a deep breath followed by glossopharyngeal insufflation. Because apnea divers sometimes experience hypotension and syncope during the maneuver, they may serve as a model to study the mechanisms of syncope. We recorded changes in hemodynamics and sympathetic vasomotor tone with microneurography during breath holding with glossopharyngeal insufflation. Five men became hypotensive and fainted during breath holding with glossopharyngeal insufflation within the first minute. In four divers, heart rate dropped suddenly to a minimum of 38 +/- 4 beats/min. Therefore, cardioinhibitory syncope was more common than low cardiac output syncope.
Keywords:	Syncope, Apnea, Sympathetic Nervous System, Parasympathetic Nervous System, Microneurography
Source:	Clinical Autonomic Research
ISSN:	0959-9851
Publisher:	Springer
Volume:	20
Number:	6
Page Range:	381-384
Date:	December 2010
Official Publication:	https://doi.org/10.1007/s10286-010-0075-5
PubMed:	View item in PubMed

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