Diziness Problem. Please advise.

My Father had a brain clot due to high BP in 2012, he immediately got treatment from fortis hospital and since 2012 he is regularly taking BP tablets Telvas AM and ecosprin. But today i.e. 8th July 2017 , He went out from AC room for some work and suddenly started feeling dizziness along with a little sweat, I gave him BP tablet and Immediately rushed to a renowned heart specialist, his bp was normal at the clinic also Dr gave him tablet to stop dizziness and said him to drink lots of water, after taking medicine he is feeling normal at the moment and sleeping. Please suggest, should we go for his CT scan or not as Heart Specialist Doctor didn't suggest anything. But I am asking this question only for the sake of precaution, Please advise.