C.O.
Call the hospital where they took your mom and get information from the nurses station there.
I'm sorry this happened. They will do a CT Scan to see if she had a heart attack or a stroke as well. High Blood pressure like that can be a stroke. I know one day my blood pressure was up to 220/150 - it was horrible and they kept me for hours before they let me go. I had a CT Scan as well to ensure I had not had a heart attack or stroke - and the CT Scan can show problems.
Don't panic. Take a deep breath. Call the hospital they took her to to get the information.
Good luck!