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Cerebral blood flow (CBF) also changes with temperature, and these changes are proportional to the changes in cerebral metabolism induced by temperature variations . Due to the physiological coupling between CBF and metabolism, decreased brain temperature induces a concomitant decrease in metabolism and blood flow , leading to decreased intracerebral vascular volume and intracranial pressure . 2 and CBF is nonlinear . During mild hypothermia after cardiac arrest in humans, CBF is low . Rewarming for 24 hours increases CBF to normal values. A recent study of 10 comatose patients who were successfully resuscitated following out-of-hospital cardiac arrest reported an effect of mild therapeutic hypothermia on CBF and cerebral oxygen extraction. The median core temperature at the start of the study was 34.3°C, and this temperature was maintained between 32 and 34°C for 72 hours. The median mean flow velocity in the middle cerebral artery (MFVMCA) was low at admission and significantly increased at 72 hours Baltimore MD sugar baby . Median jugular bulb oxygenation (SjbO2) was normal in the majority of patients throughout the study.