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Different Types of Stroke

Different Types of Stroke

 

 

 Ischaemic Stroke

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  • 80% of strokes are ischaemic
  • An ischaemic stroke happens when a blood clot blocks an artery bringing blood to the brain
  •  Stroke causes brain tissue to die


There are basically 3 types of ischaemic stroke

1. Cerebral Thrombosis

2. Cerebral Embolism

3. Lacunar stroke

Diagram of a ischaemic stroke

Cerebral Thrombosis

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  • This happens when a blood clot forms inside the brain
  • The arteries in the brain can get hard and narrow. This is called atherosclerosis.
  • This causes fat to build up in the artery
  • This slows the blood down
  • This makes a clot form

Cerebral Embolism

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  • This is a clot in the brain that has come from somewhere else in the body
  • There could be a clot in the heart or the arteries in the neck
  • The clot breaks off and travels in the blood to the brain
  • It gets stuck in the brain and cuts off the blood supply

 

Lacunar Stroke

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  • This happens in the very small arteries in the brain
  • This is because there are blockages over time in the small arteries

Haemorrhagic Stroke

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  • Nearly 20% of strokes are haemorrhagic
  • An artery in the brain bursts and bleeds
  • It can burst because it is weak (this is called an aneurysm)
  • It can burst because it is hard and narrow (atherosclerosis)

Diagram of a Haemorrhagic Stroke

Transient Ischaemic Attack

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  • A transient ischaemic attack is called a TIA (“mini-stroke”) for short
  • A TIA means part of your brain has NO oxygen for a short time
  • A TIA might only last a few minutes to a few hours
  • You might get weak on one side
  • Your speech might be different or strange
  • Your vision might be blurred
  • DO NOT IGNORE this even if it goes away after a while
  • A TIA is a warning sign that you might have a more serious stroke
  • You should go to your doctor even with minor symptoms

 
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