My mother is a cardiac patient and has undergone valve transplant as well as open heart surgery 4 years back. Now she is perfectly alright and having alternate monthly check ups which are normal. She is complaining severe head ache from past 2 hours. We went to consult emergency doctor and they checked ecg and said it is normal and suggested to visit multi speciality hospital which has cardiac and neurologist asap to identify and treat for her headache which is exactly on top of the head with pain of nerves as she explains it. Please suggest asap