What it looks like
What makes a seizure is evolution: an unequivocal change in frequency, morphology or location over time. This one begins as low-amplitude fast activity over the left temporal region, slows, grows and spreads, then stops, leaving focal slowing behind. 1
What it means at the bedside
ACNS 2021 defines an electrographic seizure as epileptiform discharges averaging more than 2.5 Hz for at least 10 seconds, or any pattern with definite evolution lasting at least 10 seconds. Ten minutes continuously, or 20% of any hour, is electrographic status epilepticus. 1