The International Subarachnoid Aneurysm
Trial is the only large, randomised, multicentre
trial to compare these two treatment methods
(Molyneux et al 2005). Their findings are
valuable to neurosurgical and radiological
teams in deciding which treatment option is
in the patient’s best interest. The trial found
that patients treated endovascularly had better
mortality and morbidity rates. This is despite
the fact that complete occlusion rates were
lower and incidence of rebleeding was higher in
this group (Molyneux et al 2005). As a result,