Stroke Patients Presents What Is A Chemical Released When Someone Is Having A Stroke?

What is a chemical released when someone is having a stroke? - stroke patients presents

I am interested in early detection, when someone suffers a stroke. I wonder whether chemicals / chemokines released by the brain when someone suffers a stroke.

I'm looking for something that is limited to a shock, not in other conditions (so you can be sure the patient has a stroke and nothing else.)