the most serious complications following subarachnoid hemorrhage from aneurysm
The most serious sequela of subarachnoid
hemorrhage is re-bleeding. The incidence of re-bleeding following aneurysm
rupture is approximately 15% in the first week, and approximately 10% in the
second week. Morbidity and mortality following re-bleed is very great and has
motivated the trend towards early intervention following aneurysm rupture.
Cerebral vasospasm is also a major cause of
morbidity and mortality following subarachnoid hemorrhage. Symptomatic brain
ischemia from vasospasm occurs in 15–35% of patients. Angiographic evidence of
vasospasm occurs in as many as 70% of patients. Vasospasm may lead to cerebral
Subarachnoid hemorrhage often also leads to
hydro-cephalus and may result in dangerously elevated intra-cranial pressure.