Rapid Changes in Pial Arterial Diameter and Cerebral Blood Flow Caused by Ipsilateral Carotid Artery Occlusion in Rats

Yoko Morita, Yasuo Fukuuchi, Atsuo Koto, Norihiro Suzuki, Kazuo Isozumi, Jun Gotoh, Toshihiko Shimizu, Masaki Takao, Masahiro Aoyama

研究成果: Article査読

11 被引用数 (Scopus)

抄録

We investigated rapid changes in pial arterial diameter and in cerebral blood flow (CBF) caused by transient ipsilateral common carotid artery occlusion (CCA-O) in anesthetized rats in order to elucidate how the cerebral circulation reacts to acute stem artery occlusion. In separate groups of rats, pial arterial diameter was recorded through a closed cranial window and CBF was recorded by laser-Doppler flowmetry. CCA-O was performed for 5 minutes under normotension and normocapnia (control) and under graded hypotension, hypercapnia and hypocapnia. In the control condition, pial arterial diameter increased rapidly, triggered by CCA-O. It took 12 ± 3 s to reach the maximum of 204 ± 42% of the value before CCA-O, and 60 ± 24 s to become stable at 131 ± 11%. CBF decreased rapidly to 66 ± 11%, then increased reactively to 135 ± 9%, and again decreased to 91 ± 3%. The reactive increase in CBF caused by CCA-O decreased in parallel with the degree of hypotension, and also became barely detectable under hypercapnia. Our data suggest that active vascular dilation in the territory of the occluded artery is important for inducing collateral circulation.

本文言語English
ページ(範囲)120-127
ページ数8
ジャーナルKeio Journal of Medicine
46
3
DOI
出版ステータスPublished - 1997 9
外部発表はい

ASJC Scopus subject areas

  • 医学(全般)

フィンガープリント

「Rapid Changes in Pial Arterial Diameter and Cerebral Blood Flow Caused by Ipsilateral Carotid Artery Occlusion in Rats」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル