Plz go to neurologist. Pt may be suffering with absence (petit mal epilepsy) seizure . He needs to be investigated by MRI brain and Brain EEG to make the diagnosis clearer. He may need antiepileptic medications like carbamazapine. Additionally Cardiac work up may need to be done at this age like BP measurement, pulse, ecg,
lipid profile , doppler carotid artery and 2 D ECHO. Its all to rule out any arrythmia or thromboembolic event.