Acute cerebrovascular disease, also known as stroke or cerebral apoplexy, is a general term for cerebral vascular diseases. It often occurs in middle-aged and elderly people, with common causes being hypertension and arteriosclerosis. When a cerebral blood vessel ruptures and blood flows into the subarachnoid space, it is called subarachnoid hemorrhage; when blood flows into the brain parenchyma, it is referred to as intracerebral hemorrhage. Due to narrowing of the cerebral vessels...