Heart Center: Cardiac, Thoracic and Vascular Care
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Syncope
There are many potential causes of passing out. The most likely causes are:
Heart rhythm abnormalities, including fast heart rates (
SVT
,
AF
,
VT
) and slow heart rates (
bradycardia or heart block
)
Vasovagal
or neurocardiogenic syncope
Low Blood Pressure (Orthostasis)
Links:
Heart Rhythm Society
Wikipedia