Cerebral blood flow velocity during simultaneous changes in mean arterial pressure and cardiac output in healthy volunteers.

ABSTRACT:

Purpose

Cerebral blood flow (CBF) needs to be precisely controlled to maintain brain functions. While previously believed to be autoregulated and near constant over a wide blood pressure range, CBF is now understood as more pressure passive. However, there are still questions regarding the integrated nature of CBF regulation and more specifically the role of cardiac output. Our aim was, therefore, to explore the effects of MAP and cardiac output on CBF in a combined model of reduced preload and increased afterload.

Method

16 healthy volunteers were exposed to combinations of different levels of simultaneous lower body negative pressure and isometric hand grip. We measured blood velocity in the middle cerebral artery (MCAV) and internal carotid artery (ICAV) by Doppler ultras

SUBMITTER: Lie SL 

PROVIDER: S-EPMC8260418 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature