Syncope is defined as a transient loss of consciousness with spontaneous recovery, typically accompanied by the loss of postural tone, that is caused by an intermittent hypoperfusion of the brain. The most common cause of syncope is vasovagal reaction, that leads to hypotension and/or bradycardia or even asystole due to activation of vagal reflex. The highest occurence is in young population, while the prevalence is lower with increasing age. Prognosis is generally very good, only potential injury due to the loss of postural tone can be dangerous [1–3].
