cerebrovascular reserve
Also written as: CVR — cerebrovascular reserve
The brain's capacity to maintain adequate blood flow through compensatory mechanisms when normal perfusion is compromised.
Full Definition
Cerebrovascular reserve represents the brain's ability to increase blood flow through vasodilation, collateral circulation, and other compensatory mechanisms when baseline perfusion is reduced due to stenosis, occlusion, or other vascular pathology. This concept is critical in neuroimaging assessment of stroke risk and treatment planning. Cerebrovascular reserve is typically measured using challenge tests with CO2 inhalation or acetazolamide administration during perfusion imaging. Editors working with stroke and vascular neuroimaging literature must understand this term to properly evaluate studies assessing hemodynamic compromise and therapeutic interventions.
Usage
Usage note: May be abbreviated as CVR in technical contexts.
In Context
- "Impaired cerebrovascular reserve was identified as a predictor of subsequent stroke risk." — stroke prevention study
- "The acetazolamide challenge revealed reduced cerebrovascular reserve in the affected hemisphere." — perfusion neuroimaging report