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Everyone has a "seizure threshold," above which they will begin seizing. For most of the population, that threshold is very high (they need an extremely high temperature or quick rise in temperature, low oxygen, etc.), so they can go an entire life without a seizure.
For some, the threshold is slightly lower. This is the category people with febrile seizures fall into: they may begin to seize as their body temperature rises quickly. The exact threshold is different for everyone, of course. My son has a very low one and will seize with a mild fever of 99.2.
For others, the threshold is so low that other factors can cause them to seize as well. In that case, the brain may get into a "pattern" of sending out abnormal electrical discharges even when the person is not clinically having a seizure. Thus, with an abnormal EEG, a future seizure is much more likely to occur under the conditions specific to that person's threshold. That doesn't necessarily mean the person has epilepsy, but it may be more likely than if the EEG had come back normal.
In addition, EEGs are dynamic: they change. Your daughter may have an abnormal EEG now, but as she grows out of her febrile seizures (assuming no non-febrile seizures occur), her EEG may turn normal again. There is just no way of knowing for sure!
Good luck!
My only concern now is why in the world is she having the fevers?! This is what frustrates me.
Just last week, she spiked a fever of 104.8, I couldn't get her fever down and she had another seizure, rushed her to the ER and for 4 hrs they could not get her fever to break, she had 2 mild febrile seizures in the ER, then they gave her a shot of roseffin and her fever broke. They let her come home after about 10 hrs. Took her to the doc the next day, and they said that she has symptoms of the roseola virus that is going around, and it usually only strikes babies between 12 and 24 months.
Now i am very scared for her. I hope too that she outgrowns these, however, my mom got epilepsy at age 30 when she had a heat stroke at a work picnic. She too as a child had febrile seizures when she would spike a fever. We havn't done any further tests as this just happened. Is she too young to be exposed to radiation thru an mri? I would appreciate anyone's feedback what steps to take next.
Thank you and good luck with your baby girl. I hope there are no more recurrences!