We studied the frequency and clinical characteristics of aura phenomen
a in 60 patients with cardiac and 40 subjects with vasovagal syncopes.
The majority (93%) of all syncope patients recalled having experience
d an aura. Aura phenomena were similar in both groups and were mostly
compound auras comprising epigastric, vertiginous, visual, or somatose
nsory experiences, but were more detailed in the noncardiac group. The
localizing significance of auras preceding a syncope was generally po
or. Although hard to distinguish from epileptic auras from their struc
ture and shape, syncope-related auras lacked symptoms that are commonl
y reported after epileptic seizures such as tastes, smells, deja vu ph
enomena, scenic visual perceptions, and speech impairments. A detailed
anamnestic exploration of auras seems worthwile in unexplained disord
ers of consciousness.