How scary, Lono! Kudos to you for being relatively calm and effective in such a stressful situation. Best wishes to you and your wife as you proceed with a diagnosis.
My sister gave her husband a terrible scare a few years ago when, in the middle of the night, she had a seizure resulting in hospitalization.
The doctors traced her seizure back to a terrible traffic accident she'd suffered twenty years prior that resulted in head injuries and a broken neck.
Apparently it's not uncommon for a head injury -- auto, sports-related or whatever -- to spur seizures more than a decade later. The docs speculated that my sister's head injury history (which left calcium deposits on her brain), fatigue, Sudafed and a prescription medication combined to trigger her first seizure. She subsequently had a couple more seizures and is now on anti-seizure medication and has not had another recurrence.
Again, my regards to both of you.