Erschienen in:
01.12.2010 | Short Communication
Glossopharyngeal insufflation induces cardioinhibitory syncope in apnea divers
verfasst von:
Gordan Dzamonja, Jens Tank, Karsten Heusser, Ivan Palada, Zoran Valic, Darija Bakovic, Ante Obad, Vladimir Ivancev, Toni Breskovic, André Diedrich, Friedrich C. Luft, Zeljko Dujic, Jens Jordan
Erschienen in:
Clinical Autonomic Research
|
Ausgabe 6/2010
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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.