Keywords: Blood vessels, Velocity & Flow, Pulsatility, Pulse wavesAs we get older, the elasticity of our blood vessels decreases significantly, which can lead to a diminished absorption of blood pressure pulsations, potentially causing damage including hemorrhagic stroke and microbleeds. We studied pulsatility in the circle of Willis, which has been hypothesized to be a pressure absorber, by the method of MRI hypersampling by analytic phase projection (APP). A significant correlation of pulsatility in the circle of Willis with age was found. This finding is interpreted as an ageing-related increase in pulsatile flow relative to the steady flow component of overall cerebral blood flow.
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