Cerebral blood flow typically represents what percentage of cardiac output?

Cerebral blood flow represents approximately 15% of cardiac output under normal physiological conditions. The brain, despite its relatively small weight compared to the rest of the body, requires a significant amount of blood flow to function properly. This 15% allocation ensures that the brain receives an adequate supply of oxygen and nutrients necessary for its metabolic activity.

This percentage is crucial because the brain is highly sensitive to fluctuations in blood flow; even minor decreases can lead to neurological deficits. Maintaining cerebral perfusion is essential, particularly during surgical procedures or in clinical scenarios involving cardiovascular compromise. A fundamental understanding of cerebral blood flow in relation to cardiac output helps perfusionists manage and optimize perfusion strategies during cardiac surgery and other procedures where cerebral protection is a concern.