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What is a Stroke?

There are 2 major types of stroke: ischaemic stroke and intracranial haemorrhage.


Ischaemic stroke is caused by a blood clot stuck in one of the arteries supplying oxygen to the brain. Intracranial haemorrhage is different. It is caused by a ruptured artery leading to bleeding into the brain matter (haemorrhage).




How common is stroke and the Costs of Stroke?

Every year about 60,000 Australians develop stroke. About 30% die in the first year. Stroke accounts for approximately USD $ 2.25 billion dollars in health costs in Australia.




Download Prof. Yan’s academic paper on health costs of stroke.




What are the Effects of Stroke?

Stroke causes significant paralysis of arms and legs. Prof. Yan’s research showed that limb weakness (arm and leg paralysis) can significantly change during the early time course and his research showed that a wireless accelerometer was a promising tool in the monitoring of arm and leg recovery post stroke.




Download Prof. Yan’s academic paper on monitoring of arm paralysis after stroke.




Is there Urgent Treatment for Stroke?

Yes. Urgent treatment is available for acute stroke. However, because blocked arteries deprive brain cells of oxygen and cell death rapidly progresses in minutes, effective treatment must be instituted within the first 6 hours of new stroke symptoms to be beneficial to the patient.


The importance of time from symptom onset to treatment has been demonstrated by Prof. Yan’s research in this area. He showed that the shorter the time to treatment was associated with improved patient outcomes in a 2012 academic paper.




Download Prof. Yan’s academic paper on benefits of urgent treatment of stroke.


Prof. Bernard Yan also showed in his research that there were specific factors in brain scans which could predict the response of stroke patients to urgent treatment. These factors utilized special features on CT perfusion scans (a special kind of CT scans).


Download Prof. Yan’s academic paper on special brain scans to predict outcome after stroke


The current gold standard of urgent treatment for stroke is mechanical thrombectomy (also termed clot retrieval). This is Prof. Bernard Yan’s specialty. Together with his team Prof. Peter Mitchell and Prof. Rick Dowling, they provide the state of the art treatment for stroke patients. Prof. Yan’s research efforts in this area have resulted in multiple academic papers. The following is an example of his research papers in mechanical thrombectomy:




Download Prof. Yan’s academic paper on clot retrieval for stroke