Syncope

Definition :

Syncope is a sudden, self-limited loss of consciousness and postural tone caused by transient global cerebral hypoperfusion and followed by spontaneous, complete, and prompt recovery

Classification : four major categories based on etiology

    1/ Neurocardiologenic (most common) : vasovagal, carotid sinus hypersentivity, and situational.
    2/ Orthostatic hypotension : hypovolemia, medication induced (iatrogenic), and autonomic dysfunction
    3/ Cardiovascular :
          * Arrhythmia
          *Mechanical
    4/Miscellanous (not true syncope) :seizure, stroked?TIA, hypoglycemia, hypoxia, psychogenic, etc..