[Vasospasm, part I: clinical symptomatology and differential diagnosis]

Vasospasm is the most dangerous and common complication of subarachnoid haemorrhage (SAH) from ruptured brain aneurysms. The frequency of vasospasm is between 11 to 72% of SAH cases. One of the consequences of vasospasm is delayed neurological deficit (DND). Clinical diagnosis of vasospasm can course many diagnostic and therapeutic problems. This paper reviews the current developments concerning history, clinical picture and differential diagnosis of vasospasm.