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Understanding Stroke

Types of Stroke

What Is a TIA? - VHL HealthSheet #82582_VA
A TIA (transient ischemic attack) is an early warning that a stroke (also called a brain attack) is coming. A TIA is a temporary stroke. It causes no lasting damage.
What Is Ischemic Stroke? - VHL HealthSheet #82579_VA
The brain needs a constant supply of blood to work. During a stroke, blood stops flowing to part of the brain. The affected area is damaged. Its functions are harmed or even lost. Most strokes are caused by a blockage in a blood vessel that supplies the brain. They can also occur if a blood vessel in the brain ruptures (bursts open).
Hemorrhagic Stroke: Subarachnoid Hemorrhage - VHL HealthSheet #40952_VA
A hemorrhagic stroke happens when a blood vessel in the brain ruptures or leaks. A blood vessel on the surface of the brain bursts and bleeds (hemorrhages). This spills blood into the surrounding tissue.The arachnoid is one of the 3 membranes that surround the brain. In a subarachnoid hemorrhage, the blood leaks under this membrane. This type of stroke often happens suddenly, with little warning. It is the most serious of all types of strokes.
What Is Hemorrhagic Stroke? - VHL HealthSheet #88880_VA
The brain needs a constant supply of blood to work. During a stroke, blood stops flowing to part of the brain. The affected area is damaged. Its functions are harmed or even lost. Most strokes are caused by a blockage in a blood vessel that supplies the brain (ischemic stroke). They can also occur if a blood vessel in the brain breaks open (ruptures). This is a hemorrhagic stroke.
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