Study on Prognosis of Acutely Ruptured Intracranial Aneurysms

Inclusion Criteria: * Confirmed diagnosis of subarachnoid haemorrhage on CT-scan or lumbar puncture (in the presence of a negative CT-scan) * Intracranial aneurysm proven within 6 months to be the cause of subarachnoid haemorrhage * Age 18 years or over at presentation. * Written informed consent Exclusion Criteria: * Subarachnoid haemorrhage deemed most likely of 'perimesencephalic' origin after consideration of history, clinical examination and radiological findings (including angiographic imaging) * Subarachnoid haemorrhage deemed most likely of post-traumatic origin after consideration of history, clinical examination and radiological findings (including angiographic imaging) * Diagnosis of intracerebral arteriovenous malformations or dural arteriovenous fistula. * No diagnosis of intracranial aneurysm at 6 months after onset of symptoms. * Not mastering the Dutch language