How Does Hypotension Cause A Stroke Can HYPOtension Cause Heart Attack Or Stroke?

Can HYPOtension cause heart attack or stroke? - how does hypotension cause a stroke

I do not know, I know that hypertension can cause such insurance, but how can it stresses HYPO? Then I read something about Viagra and nitrates to lower blood pressure, but can cause a heart attack and stroke, can someone explain how?