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Journal of Korean Neurosurgical Society 1981;10(2): 719-730.
Evoked Responses in Intracranial Aneurysms and Arteriovenous Malformations.
Gook Ki Kim
Department of Neurosurgery, School of Medicine, Kyung Hee University, Seoul, Korea.
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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