PMID: 2505152Apr 1, 1989Paper

Brain function and blood flow velocity in the middle cerebral artery in subarachnoid hemorrhage: evaluation with multimodality evoked potentials (MEPs) and transcranial Doppler (TCD) ultrasound

No shinkei geka. Neurological surgery
M ShigemoriS Kuramoto

Abstract

Brain dysfunction and blood flow velocity changes in the middle cerebral artery (MCAFV) were studied in 59 patients with ruptured cerebral aneurysms presenting subarachnoid hemorrhage. Brain function and blood flow velocity were evaluated by multimodality evoked potentials (MEPs) consisting of ABR, SEP and VEP as reported, and transcranial Doppler (TCD) ultrasound. The abnormality on MEPs were graded into 4 grades. Nearly normal, mildly abnormal, moderately abnormal and severely abnormal. The results on MEP study were compared with clinical Hunt and Hess (H. H) grade or Fisher's CT group of subarachnoid hemorrhage in 44 patients. MCAFV was measured in 15 patients and mean velocity as well as CO2 reactivity and effect of head elevation were studied. Control value of MCAFV was 64 +/- 13 cm/sec in 50 healthy adults. CO2 reactivity was determined by K values obtained from the modified formula of cerebral blood flow by Olesen et al. MEP grade in H. H grade III and IV patients showed, on admission, variations in their grades in comparison with those in H. H grade I II and V patients. There was no definite correlation between the abnormality in MEPs and the degree of subarachnoid hemorrhage in Fisher's group 3 and 4 patients. When the...Continue Reading

Related Concepts

Related Feeds

Aneurysm

Aneurysms are outward distensions or bulges that occurs in a weakened wall of blood vessels. Discover the latest research on aneurysms here.

Attention Disorders

Attention is involved in all cognitive activities, and attention disorders are reported in patients with various neurological diseases. Here are the latest discoveries pertaining to attention disorders.