脳動静脈奇形に関する研究—2．脳循環動態の検討

Cerebral Arteriovenous Malformations: 2.A study of cerebral hemodynamics

I．緒言

　脳動静脈奇形16例について，¹³³Xe inhalation cere—brographにより両側大脳半球皮質領域の脳循環動態を，また最近開発されたXe enhanced CT scanによってnidus周囲および大脳深部の脳循環動態を，さらにこれらとnidusの大きさ，位置，発症時臨床症状などとの相関において検討したので報告し，あわせて若干の考察を加える．

Regional cerebral blood flow (rCBF) in 16 patients with cerebral AVM was measured using 133-Xe inhalation cerebrograph, and in 3 patients rCBF was measured using stable xenon enhanced CT. Neurolo-gical status and angiographical findings were studied in the connection with rCBF measurement.

RCBF in almost patients with hemorrhagic episodes was low in the frontal area (frontal depres-sion). The larger the size of nidus is, the higher the shunt flow through nidus is, therefore, there were no significant difference of mean rCBF between the affected and non-affected hemisphere independently of the size of nidus.