Subarachnoid hemorrhage other imaging findings
Subarachnoid Hemorrhage Microchapters |
Diagnosis |
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Treatment |
AHA/ASA Guidelines for the Management of Aneurysmal Subarachnoid Hemorrhage (2012)
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Case Studies |
Subarachnoid hemorrhage other imaging findings On the Web |
American Roentgen Ray Society Images of Subarachnoid hemorrhage other imaging findings |
Risk calculators and risk factors for Subarachnoid hemorrhage other imaging findings |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Sara Mehrsefat, M.D. [2]
Overview
Other imaging findings
Once a subarachnoid hemorrhage is confirmed, the next question is about its origin. CT angiography (using radiocontrast) to identify aneurysms is generally the first step, as invasive angiography (injecting radiocontrast through a catheter advanced to the brain arteries) has a small rate of complications but is useful if there are plans to obliterate the source of bleeding, such as an aneurysm, at the same time.
Digital-subtraction cerebral angiography
Digital-subtraction cerebral angiography is used in following conditions:
- In patients with uncertain diagnosis after CT scan and LP
- In patients with septic endocarditis and SAH to search for mycotic aneurysms
- To provide surgical information such as:
- Cerebrovascular anatomy
- Aneurysm location and source of bleeding
- Aneurysm size and shape
- Relation of the aneurysm to the parent artery and perforating arteries
- Presence of multiple or mirror aneurysms