The past decade has seen a tremendous advancement in knowledge of neurally mediated hypotensive disorders as a cause of recurrent unexplained syncope. The use of head-upright tilt-table testing has provided clinicians not only with a diagnostic modality for these disorders, but also with a controlled setting whereby the pathophysiologic alterations that accompany syncope can be carefully measured and recorded. During the course of these investigations, it has become apparent that classic neurocardiogenic (or vasovagal) syncope is only one of the hypotensive disorders that cause the loss of consciousness provoked with tilt-table testing.<sup>9 Grubb B.P., Kosinski D. Current trends in the etiology, diagnosis and management of neurocardiogenic syncope Curr Opin Cardiol 1996 ;  11 : 32-41  [cross-ref]

Cliquez ici pour aller à la section Références</sup> At the same time, it has been observed that neurocardiogenic syncope can be provoked by stimuli other than orthostatic stress. This article gives a brief overview of these two groups of disorders that may also result in recurrent fainting: dysautonomic syncope and reflex syncope.