What are the most common complications following a subarachnoid haemorrhage?

The immediate effects of subarachnoidal haemorrhage [inaudible] to life. One of the significant and recognised consequences of a subarachnoidal haemorrhage is the vessels tightening on themselves, so-called vasospasm. And we see that angiograph of those, through the pictures of the arteries in about 50% of patients. On a clinical level where they actually have symptoms from their vasospasm, we probably see half of those patients have angiographic vasospasms. So it's an important cause of ongoing risk to stroke following a subarachnoid haemorrhage.