Syncope, or fainting, is defined as a sudden failure of blood flow to the brain that directly results in loss of consciousness. Syncope is often associated with tachycardia, neurological disorders, and diabetic neuropathy.
Origin
Syncope has causes of different origins, which sometimes may not even be identified with certainty. The sudden decrease in the amount of blood going to the brain may be due to: physical exertion, sudden changes in blood pressure, strong emotions, previous heart disease, and even taking certain medications. It can also affect from a neurological point of view, and thus result in syncope, diabetes.