What is subarachnoid hemorrhage?
The brain is covered by a thin layer of fluid which lies within the subarachnoid space. When blood leaks into this space the patient suffers headache of an intensity which can only be described as thunderclap. The commonest cause of subarachnoid hemorrhage is a ruptured intracranial aneurysm. This is a dangerous condition , left untreated the aneurysm can rupture again which can be fatal.