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Updated: Jul 11, 2026

Double Direct Injection of Blood into the Cisterna Magna as a Model of Subarachnoid Hemorrhage
Published on: August 30, 2020
Subarachnoid hemorrhage following chronic dural venous sinus thrombosis
Sunil Pradhan1, Ramakant Yadav, Himanshu Diwakar
1Department of Neurology Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India. spradhan@sgpgi.ac.in
Abstract:
Subarachnoid hemorrhage (SAH) in older individuals is most often due to aneurysmal rupture. Other vascular lesions are known to rarely cause SAH. In this article, we report a case of chronic dural sinus thrombosis with recurrent SAH, most probably due to raised venous pressure in draining venous tributaries. No aneurysm was detected on magnetic resonance angiography or on digital subtraction angiography. The patient improved with conservative management. The case report emphasizes inclusion of magnetic resonance venography in the diagnostic workup of SAH, particularly in those cases in which aneurysm is not detected.
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