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New Mechanism of Vasovagal Syncope -Trigeminocardiac Reflex-  

Yoon, Ji Young (Department of Dental Anesthesia and Pain Medicine, School of Dentistry, Pusan National University)
Kim, Cheul Hong (Department of Dental Anesthesia and Pain Medicine, School of Dentistry, Pusan National University)
Publication Information
Journal of The Korean Dental Society of Anesthesiology / v.12, no.3, 2012 , pp. 151-155 More about this Journal
Abstract
A vasovagal reaction is defined as the 'development of hypotension and bradycardia associated with the typical clinical manifestations of pallor, sweating and weakness'. The most profound degree of vasovagal reaction results in fainting or syncope. Incidence of vasovagal reactions in the local anesthetic department of a dental hospital is around 2%. The pathophysiology of the hypotension/bradycardia reflex responsible for vasovagal syncope is not completely understood. Central as well as peripheral mechanisms have been implicated in its pathogenesis: however their relative contribution is not fully elucidated. Recently, trigeminocardiac reflex, previously known as oculocardiac reflex, may serve as syncope. The management of vasovagal syncope is evolving. Non-pharmacological treatment options are a fundamental first step of all treatment pathways. In this article, we would like to review new mechanism of vasovagal syncope and hope to be of help to manage the syncopal patients.
Keywords
Bradycardia; Hypotension; Trigeminocardiac reflex; Vasovagal syncope;
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