J Korean Neurosurg Soc.
1981 Sep;10(2):719-730.
Evoked Responses in Intracranial Aneurysms and Arteriovenous Malformations
- Affiliations
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- 1Department of Neurosurgery, School of Medicine, Kyung Hee University, Seoul, Korea.
Abstract
- Somatosensory evokd responses(SSERs) and auditory evoked responses(AERs) were studied in 33 patients with cerebral aneurysms and arteriovenous malformations(AVMs) to see if these tests were useful indicators of cerebral vasospasm. 7/21 had abnormal SSER and 5/28 an abnormal AER. The SSER was abnormal in 4/7 patients with severe vasospasm but in only 1/13 without spasm or with mild or moderate spasm. Abnormal SSERs in patients with severe vasospasm indicated a poor prognosis. Abnormalities on the SSER and AER correlated best with the degree of clinical deficit. These tests seemed insufficiently sensitive to reliable detect impending ischemia.
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