SAH: subarachnoid hemorrhage; CT: computed tomography; DSA: digital subtraction angiography; CTA: computed tomographic angiography; MRI: magnetic resonance imaging.
* Refer to UpToDate topics for additional information on management of causes of SAH.
¶ Perimesencephalic pattern of acute SAH on head CT performed within 72 hours of onset consists of blood centered anterior to and in contact with the prepontine, interpeduncular, and/or suprasellar cisterns. Extent of blood on head CT should be restricted to the suprasellar, interpeduncular, crural, ambient, quadrigeminal, prepontine, and/or cerebellomedullary cisterns.
Δ Additional diagnostic testing is generally performed for patients with atypical features suggestive of a spinal source to bleeding such as those with prominent radicular symptoms and cervicomedullary location of bleeding or if the sensitivity of initial testing is limited by the presence of acute blood or vasospasm. Refer to UpToDate topic for additional details.آیا می خواهید مدیلیب را به صفحه اصلی خود اضافه کنید؟