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(1)前大脳動脈(ACA)のみの閉塞27例(両側ACA 4例,右ACA 8例,左ACA 15例)の閉塞血管,CT所見,臨床症状を分析した。
(2)男15名,女12名で平均年齢はそれぞれ,61.5土7.98歳,66.1±6.45歳であった。脳血栓症が22例,脳塞栓症が5例であった。
(3)27例中22例(81%)は入院時に意識が清明であり,このことが退院時の良好なADLにつながるものと思われた。すなわち完全回復9例(33%),自立12例(44%)であった。
(4)27例中,CTで得られた梗塞巣がACA閉塞側のACA支配領域にあると判定できたのは17例(63%),CTで梗塞巣は認められたがACA支配領域にないものは9例(33%),CTで所見を認めなかったのは1例であった。
(5)脳卒中発症ではあるが,ACA閉塞が偶然発見されたのが4例あった。それを除く23例の症状は運動障害,精神症状,神経心理学的症状など多彩で,主なものは,初発症状としては下肢単独または下肢に強い片麻痺であり(おのおの35%),入院中に認められた症状としては片麻痺(74%),尿失禁(39%),強制把握(39%),緘黙状態(30%),無関心(26%),各種の失行(22%)等であった。
From the years 1977 through 1989, the author experienced 27 cases with only anterior cerebral artery (ACA) occlusion but without any other main cerebral arterial occlusions. These were proven by cerebral angiographies and verified by CT.
Two patients showing large infarction in the left frontal lobe on CT but showing no evidence of arterial occlusion by cerebral angiography were also registered in this study because these patients were thought to have recanalized ACA.
There were 15 males and 12 females with an age of 61. 5±7. 98 (mean±SD) and 66. 1±6. 45, respec-tively. Twenty two cases had cerebral thrombosis and 5 had cerebral embolism. There were 4 cases with bilateral ACA occlusions, 8 with right ACA occlusion and 15 with left ACA occlusion.
Twenty two patients (81%) were alert on admis-sion and this fact might explain their excellent ADL on discharge : full recovery in 9 patients (33%) and self-management in 12 patients (44%).
Seventeen patients (63%) had a CT-proven in-farcted area with a correlation to ACA occlusion (s), while 9 patients (33%) showed no correlation between an infarction on CT and an ACA occlu-sion. One patient showed no abnormal findings on CT.
Four patients with right ACA occlusion were incidentally observed, even though their mode of onset was strokes. The symptoms of the other 23 patients were those of anterior cerebral artery syndromes : hemiparesis (74%), urinary incon tinence (39%), forced grasping (39%), mutism (30%), indifference (26%) and apraxia (22%) etc.
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