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

• Morita Yoko

  Department of Neurology, Second Tokyo National Hospital School of Medicine, Keio University

• Fukuuchi Yasuo

  Department of Neurology, School of Medicine, Keio University

• Koto Atsuo

  Department of Neurology, School of Medicine, Keio University

• Suzuki Norihiro

  Department of Neurology, School of Medicine, Keio University

• Isozumi Kazuo

  Department of Neurology, School of Medicine, Keio University

• Gotoh Jun

  Department of Neurology, School of Medicine, Keio University

• Shimizu Toshihiko

  Department of Neurology, School of Medicine, Keio University

• Takao Masaki

  Department of Neurology, School of Medicine, Keio University

• Aoyama Masahiro

  Department of Neurology, School of Medicine, Keio University

Abstract

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 dosed 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.

Journal

• The Keio Journal of Medicine

  The Keio Journal of Medicine 46 (3), 120-127, 1997

  The Keio Journal of Medicine

Keywords

• pial artery
• cerebral blood flow
• carotid occlusion
• collateral circulation
• reactive hyperemia

Details

• CRID: 1390282681313426176
• NII Article ID: 10021988018
• NII Book ID: AA00710216
• DOI: 10.2302/kjm.46.120
• ISSN: 18801293
• ISSN: 00229717
• PubMed: 9339639
• Web Site: https://www.jstage.jst.go.jp/article/kjm1952/46/3/46_3_120/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/1998049502
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • PubMed
  • CiNii Articles
• Abstract License Flag: Disallowed