To have a stroke do you need to have very high blood pressure.
Or is it the weaken conditions of the artery or vein system
And the blood pressure is only moderately high?

Information that you find on the following sites should be of help to you. I hope that they are. There can be a number of factors that lead to a stroke and cause a stroke.

Stroke causes, impacts and treatment of strokes from MedicineNet.com

What Causes a Stroke

Just one more site for you:

strokes explained

Check out a few of these web sites, they tell you the cause of various types of stokes

Stroke causes, impacts and treatment of strokes from MedicineNet.com

Stroke


Looks like while I was typing others were posting the same info,