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CLINICAL ANALYSIS OF ETIOLOGY OF SPONTANEOUS SUBARACHNOID HEMORRHAGE DIAGNOSED BY COMPUTED TOMOGRAPHY Kuniaki Ogasawara 1 , Takamasa Kayama 1,2 , Yoshiharu Sakurai 1 , Hiroshi Niizuma 1 , Hiroo Sato 1 , Akiko Nishino 1 1Department of Neurosurgery, Stroke Center, Sendai National Hospital Keyword: subarachnoid hemorrhage , computed tomography , repeated angiography , cerebral aneurysms , unknown etiology pp.399-404
Published Date 1990/4/1
DOI https://doi.org/10.11477/mf.1406900049
  • Abstract
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In 575 cases with subarachnoid hemorrhage(SAH) diagnosed by computed tomography (CT) scan, four vessel cerebral angiography was per-formed several times at more than two-week inter-vals to investigate a source of the hemorrhage. The first four-vessel study on admission revealed 530 cases (92. 2%) of ruptured cerebral aneurysms, four (O. 7%) of ruptured arteriovenous malforma-tion, 25 (4. 3%) of unknown etiology. Repeated fourvessel study showed eight (32. 0%) aneurysms among 25 cases whose first studies were negative. Six of the eight cases had aneurysms in the vertebro-basilar system. In 11 cases, repeated four-vessel study failed to detect the hemorrhagic source ; and no generalized diseases were noted. One of them had recurrence of SAH 19 months after the onset of the initial one. The patient was underwent operation, which showed throm-bosed ruptured aneurysm. Our present investiga-tion demonstrated that ruptured aneurysm was responsible for 94. 8% of all 575 cases of SAH detected by CT sacns and 10 cases (1.7%) were diagnosed as cases of SAH of unknown etiology.


Copyright © 1990, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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