Final answer:
A hemorrhagic stroke is primarily caused by the rupture of a brain artery leading to bleeding, increased intracranial pressure, and blood flow disruption. It can be more fatal than ischemic strokes and high blood pressure is a key risk factor for stroke occurrence.
Step-by-step explanation:
The main cause of a hemorrhagic stroke is the rupture of an artery in the brain, which leads to bleeding within the brain tissue. This bleeding results in the accumulation of blood in a region of the cranial vault, exerting physical pressure on brain tissue. Not only does this pressure cause a loss of brain function, but it can also compromise blood flow further beyond the site of the hemorrhage due to the squeezing of local arteries. The disruption of the blood-brain barrier and the subsequent buildup of fluid—known as edema—further aggravate the damage to brain cells.Surgery can sometimes be necessary to relieve the intracranial pressure caused by the accumulated blood. While hemorrhagic strokes are less common than ischemic strokes, accounting for about 10 percent of all strokes, they are more likely to be fatal.
High blood pressure is the main risk factor for any stroke, and managing it is essential for prevention.A hemorrhagic stroke occurs when an artery in the brain ruptures and causes bleeding in the brain. This results in the accumulation of blood, which fills a region of the cranial vault and presses against the brain tissue. The physical pressure on the brain can cause the loss of function and compromised blood flow. Additionally, the breakdown of the blood-brain barrier can lead to fluid accumulation in the region, known as edema.