Cerebral Vasospasm

The cerebral arteries become spastic with a muscular contraction, known as cerebral vasospasm. The contraction from vasospasm can produce a focal constriction and cause reduction of blood flow induces cerebral ischemia. Vasospasm usually is induced when bleeding occurs in the subarachnoid space. Eventually, the arteries in the subarachnoid space can reverse to the normal diameter within days or weeks (Wilkins et al., 1998).
Hemorrhage
Due to any pathological reasons for instance aneurysms and arteriovenous malformations (AVMs), the arterial wall might become abnormally weak and possibly rupture. With vessel rupture, haemorrhage occurs with blood infiltrating into the surrounding brain tissue. As the blood turns to clot and collects inside