<unk>  is the transient loss of consciousness (LOC) due to cerebral hypoperfusion and it is characterized by a rapid onset, a short duration and a spontaneous complete recovery.  It is important to identify the cause of<unk>  and recognize high risk patients with structural heart disease or abnormal ECG findings.  The initial management of<unk>  depends on the etiology of the<unk>  which can be either reflex, orthostatic hypotension or cardiovascular.
Syncope
Presyncope
Laryngospasm
Apnea
Bronchospasm
Sleep paralysis
Chest pain  
Chest pain