"larger size (> 7 mm)"
"aneurysm growth over time (annual growth> 1 mm)"
"CT angiography is the standard modality for identifying intracranial aneurysms. MRI with vessel wall imaging (VVI) can be used for assessing culprit aneurysms in the setting of patients with acute SAH and multiple aneurysms on CTA11."
"Digital subtraction angiography remains the gold standard for identifying ruptured aneurysms causing SAH and has a specific role as second-line imaging following a negative CTA (as indicated in guidelines). The diagnostic yield of DSA after a negative CTA has been reported to be ~7.5% (range 4–13%) 10."
"Japanese population"
"ACOM (~35%): septum pellucidum, interhemispheric fissure and intraventricular, inferior frontal lobe (intraparenchymal)"
"PCOM (~35%): Sylvian fissure, medial temporal lobe (intraparenchymal)"
"PICA: foramen magnum"
"Mortality from the first rupture is between 25-50%, with repeat bleeding a common complication in survivors. With each recurrent bleed, the prognosis worsens. In the first few days following a subarachnoid haemorrhage, there is an increased risk of additional ischaemic injury from the reactive vasospasm of the surrounding vasculature 5."
Expected headings
"Determining the site of rupture"
"Aneurysmal characteristics suggestive of rupture"
"Complications"
"focal neurological deficits (e.g. sensory loss, weakness, memory loss, language difficulties)"
"DSA can be particularly useful in the setting of early aneurysm thrombosis. Thrombosed aneurysms may be occult on initial CTA and DSA, yet carry the risk of recanalisation over days to weeks; for this reason, a negative early repeat study cannot definitively exclude a small thrombosed ruptured aneurysm 10."