Cerebrovascular Disease Mechanisms

'Stroke' is a generic term, lacking pathological meaning. Cerebrovascular diseases can be defined as those in which brain disease occurs secondary to a pathological disorder of blood vessels (usually arteries) or blood supply.

1. Occlusion by thrombus or embolus.

- 2. Rupture of vessel wall.

3. Disease of vessel wall.

- 2. Rupture of vessel wall.

3. Disease of vessel wall.

Whatever the mechanism, the resultant effect on the brain is either:

ischaemia/infarction, or haemorrhagic disruption.-

4. Disturbance of normal properties of blood.

Of all strokes: - 85% are due to INFARCTION

- 15% are due to HAEMORRHAGE

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