Yes, I've had the trip to the vet thinking my Nova had had a stroke, but it was idiopathic vestibular syndrome. If you search the term you may come up with the thread I started asking the same questions you are asking.
Nova largely recovered within a few days to a week. She has had a couple of very minor relapses where she is unsteady and a bit disoriented. However, her quality of life is generally good for a 14.25 year old girl. Good Luck!