Sys BP (mmHg) | |
Dias BP (mmHg) | |
ICP (mmHg) | |
CVR (dynes) |
Cerebral Blood Flow (CBF)=
(MAP - ICP)/CVR
MAP(Mean art press)= DBP+[1/3(SBP-DBP)]
ICP=intracranial press
CVR = Cerebral Vascular Resistance (units are dynes = mmHg/mL/min)
Within the limits of systemic MAP, the brain alters CVR to keep CBF constant.