Table 3

 Distinguishing myoclonic jerks during syncope from seizures

LOC, loss of consciousness.
Begin after fallingBegin while standing
Typically paleMay be cyanotic
LOC usually <1–2 minutesLOC often >5 minutes
Incontinence less commonIncontinence more common
No tongue bitingTongue biting occurs in about 25%
Post-syncopal confusion typically mild or absent, but prolonged fatigue is commonPost-ictal confusion universal and often prolonged
Difficult to stand before complete recoveryCan often stand early in recovery