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Related Experiment Videos

Nonaneurysmal convexity subarachnoid hemorrhage.

Kalpesh C Patel1, Pasquale F Finelli

  • 1Department of Neurology, Hartford Hospital, Hartford, and University of Connecticut School of Medicine, CT 06102-5037, USA.

Neurocritical Care
|June 8, 2006
PubMed
Summary

Primary convexity subarachnoid hemorrhage (SAH) is typically not caused by aneurysms. Noninvasive imaging is sufficient for evaluating this condition, avoiding unnecessary catheter angiography.

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Area of Science:

  • Neurology
  • Radiology
  • Neurosurgery

Background:

  • Catheter angiography is standard for subarachnoid hemorrhage (SAH) to rule out aneurysms.
  • However, some SAH types, like primary convexity SAH, are often nonaneurysmal.
  • Invasive angiography may not be justified for these cases.

Observation:

  • This study reviewed 5 new and 7 literature cases of primary convexity SAH.
  • Etiology, diagnostic imaging, and patient outcomes were analyzed.
  • The objective was to determine if primary convexity SAH originates from aneurysms.

Findings:

  • Diagnostic imaging included CT, MRI, CT angiography, and MR angiography/venography.
  • Catheter angiography was performed in 6 patients.
  • No aneurysms were identified as the cause of SAH in any of the 12 patients.

Implications:

  • Primary convexity SAH appears to be nonaneurysmal in origin.
  • Patient outcomes were uniformly benign, with no rebleeding.
  • Noninvasive diagnostic strategies are adequate for evaluating primary convexity SAH, reducing risks associated with angiography.

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