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Subarachnoid haemorrhage of unknown origin
Acta Neurochirurgica
|January 1, 1986
Summary
Patients with angiographically negative subarachnoid hemorrhage (SAH) show a benign clinical course. This suggests possible links to microaneurysms or spontaneous aneurysm thrombosis, warranting further investigation.
Area of Science:
- Neurology
- Neurosurgery
- Radiology
Background:
- Subarachnoid hemorrhage (SAH) is a critical neurological condition.
- Angiographically negative SAH presents a diagnostic challenge.
- Understanding the etiology and prognosis of negative SAH is crucial.
Purpose of the Study:
- To analyze the clinical characteristics and prognosis of patients with angiographically negative SAH.
- To compare angiographically negative SAH with SAH from ruptured aneurysms.
- To explore potential underlying causes for angiographically negative SAH.
Main Methods:
- Retrospective analysis of 64 patients with angiographically negative SAH.
- Inclusion criteria: adequate cerebral angiography, absence of spinal SAH or intracerebral hematoma.
- Clinical data review and outcome assessment.
Main Results:
- Angiographically negative SAH shares clinical similarities with SAH from ruptured aneurysms, excluding prognostic factors.
- The condition demonstrates a benign clinical course.
- Medium and long-term prognosis is favorable.
Conclusions:
- Angiographically negative SAH has a generally good prognosis.
- Hypotheses include rupture of microaneurysms (<2mm) with arterial wall repair.
- Spontaneous thrombosis of saccular aneurysms with potential recanalization is also considered.