Conditional Migraine with Neurological Neuropaphy?

My wife had an event recently that has me very confused. She is 55 and these events took place one week apart. She drove to my daughter's house, when she got out of the car she blacked out on the driveway. When my daughter got to her she ask who she was and was confused. A trip to the ER showed nothing. Her memory returned and she seemed fine the next day. One week later same thing happened, but this time she lost movement of her right side, speech was slurred, no memory. She said she had a very bad headache on the right side above her ear. She was rushed to the ER. A CAT scan was taken and was negative. Since it appeared she had suffered a stroke the doctor gave her TPA. He than said she needed to go to a different hospital. Once there, she was examined and admitted. In the next few days all kinds of test were done including, MRI, X-ray, blood and ultra sound of the carotids. Her doctor told me that she has a "Conditional Migraine with Neurological Neuropaphy. her condition after 5 da