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| ==Overview== | | ==Overview== |
| Syncope has passed through various attempts to define it, the last one being; a transient loss of consciousness due to cerebral hypo perfusion. Syncope belongs to the non- traumatic causes of T-LOC.
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| ==Historical Perspective== | | ==Historical Perspective== |
| Syncope was defined by European Task Force in 2009 Guidelines as the transient loss of consciousness (T-LOC), due to cerebral hypoperfusion. The T-LOC was characterized by four features:
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| *Transient
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| *Rapid onset
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| *Brief duration
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| *Spontaneous recovery
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| Previous definitions did not included the cause of the T-LOC (cerebral hypoperfusion). This lead to incorrect diagnosis, because T-LOC, includes a series of other pathologies that are not caused by hypoperfusion, such as seizures, epilepsy, metabolic disturbances (hypoglycemia, hipoxia), vertebrobasilar TIA ([[transient ischaemic attack]]), intoxication, among others. <ref name="pmid19713422">{{cite journal| author=Task Force for the Diagnosis and Management of Syncope. European Society of Cardiology (ESC). European Heart Rhythm Association (EHRA). Heart Failure Association (HFA). Heart Rhythm Society (HRS). Moya A et al.| title=Guidelines for the diagnosis and management of syncope (version 2009). | journal=Eur Heart J | year= 2009 | volume= 30 | issue= 21 | pages= 2631-71 | pmid=19713422 | doi=10.1093/eurheartj/ehp298 | pmc=PMC3295536 | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=19713422 }} </ref>
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| ==References== | | ==References== |