Faculty Profiles - AKIYAMA Tomoyuki

MISC - AKIYAMA Tomoyuki

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Electroencephalographic changes and their regional differences during pediatric cardiovascular surgery with hypothermia

AKIYAMA Tomoyuki, KOBAYASHI Katsuhiro, NAKAHORI Tomoyuki, YOSHINAGA Harumi, OGINO Tatsuya, OHTSUKA Yoko, TAKEUCHI Mamoru, MORITA Kiyoshi, SANO Shunji, OKA Eiji

Brain Dev 23 ( 2 ) 115 - 121 2001

B-13 複雑部分発作の発作時脳波の有用性と限界

吉永治美, 大守伊織, 浅野孝, 秋山倫之, 岡〓次

日本てんかん学会プログラム・予稿集 ( 34 ) 116 - 116 2000

Electroencephalographic changes during open-heart surgery with extracorporeal circulation and hypothermia in children

AKIYAMA Tomoyuki

Okayama Igakkai Zasshi (Journal of Okayama Medical Association) 111 ( 3 ) 71 - 83 1999.8

Language：Japanese Publisher：Okayama Medical Association

An electroencephalographic (EEG) study with a multi-channel digital record was carried out to investigate EEG changes and their spatial characteristics accompanying hypothermia and cerebral ischemia during open-heart surgery in children.<br>Subjects consisted of 10 children, ranging from 1 year 6 months to 4 years 6 months old, who underwent open-heart surgery with extracorporeal circulation and hypothermia. The EEG changes were evaluated visually and analyzed using a computer.<br>(1) A discontinuous EEG pattern was noted during cooling in addition to commonly observed findings including a decrease in fast waves, slowing and amplitude reduction, and was considered caused by rapid and transient suppression of cerebral function. (2) Power spectral and topographical analyses revealed a prominent decrease in fast waves and a relative increase in slow waves during cooling. During cerebral ischemia, in contrast, an actual increase in slow waves and decrease in fast waves were observed. (3) We noted the characteristics of bilateral synchronous rhythmic high-voltage slow waves among various types of transient EEG abnormalities. (4) EEG changes induced by hypothermia differed by brain region. (5) EEG changes induced by hypothermia were influenced not only by body temperature itself but also by the rate of change in body temperature.

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Isolation of epileptiform discharges from unaveraged EEG by independent component analysis

KOBASYASHI K.

Clin Neurophysiol 110 1755 - 1763 1999