Apparently. High blood pressure and low blood pressure can cause dizziness and faintness under certain circumstances.
So can Parkinson's. So can the effect of drugs taken for various conditions.
I'm skeptical of the Parkinson's theory, since a lot of the speculation involves photos where it's more likely that she's joking in some way, rather than having a seizure.
Do you have MD after your name.? Are you a diplomate of the American Board of Psychiatry and Neurology?