There is considerable utility in the use of transcranial Doppler ultrasound (TCD) to assess
cerebrovascular function. The brain is unique in its high energy and oxygen demand but …

Cerebral blood flow (CBF) and its distribution are highly sensitive to changes in the partial
pressure of arterial CO2 (PaCO2). This physiological response, termed cerebrovascular …

Background and Purpose—The relationship between middle cerebral artery (MCA) flow
velocity (CFV) and cerebral blood flow (CBF) is uncertain because of unknown vessel …

To establish the accuracy of transcranial Doppler ultrasound (TCD) measures of middle
cerebral artery (MCA) cerebral blood flow velocity (CBFV) as a surrogate of cerebral blood …

Cerebrovascular reactivity (CVR) magnetic resonance imaging (MRI) probes cerebral
haemodynamic changes in response to a vasodilatory stimulus. CVR closely relates to the …

It is known that cerebral blood flow declines with age in sedentary adults, although previous
studies have involved small sample sizes, making the exact estimate of decline imprecise …

In the evaluation of cerebrovascular CO2 reactivity measurements, it is often assumed that
the diameter of the large intracranial arteries insonated by transcranial Doppler remains …

DESPITE CONSIDERABLE ANATOMICAL knowledge acquired by anatomists three
centuries ago, little was known about the brain's circulatory control until the latter half of the …

Intact, coordinated, and precisely regulated cerebrovascular responses are required for the
maintenance of cerebral metabolic homeostasis, adequate perfusion, oxygen delivery, and …

Transcranial Doppler is a widely used noninvasive technique for assessing cerebral artery
blood flow. All previous high altitude studies assessing cerebral blood flow (CBF) in the field …