Last time I had to go to hospital with an attack (4 weeks ago), I just couldn't speak to give the nurse any info, and was dizzy and confused so couldn't really respond to questions.
I checked out medical bracelets - someone on here suggested MedicAlert. I eventually plumped for SOS Talisman, as the info is right there on your person without the medics having to ring a number to find out about you.
Today it was a godsend, as again I was dizzy and not very lucid - couldn't even remeber my DOB, so just pointed to my wrist and within seconds they had all the info they needed.
If you don't have something like this, I heartily recommend it.