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Aortic valve diseases such as aortic stenosis and aortic regurgitation, are the most frequent valvular heart diseases. The lesions in the valves affect circulation in the whole arterial system. We study the effects with the use of a 1-D model in which an arterial segment transmits a single mode of pulse waves. The appropriate reflection coefficient and the form of the stroke pressure are devised to...
Cerebral hemodynamics in humans is affected by postural changes (variations of the brain-axis direction with respect to the gravity field) and alterations of the basal hydraulic conductances in the main extracranial vasculature (jugular stenosis). The combined action of these factors can affect basal pressures and flows at any point of the cardiovascular system, potentially leading to different short...
Alterations in the extracranial venous circulation due to posture changes, and/or extracranial venous obstructions in patients with vascular diseases, can have important implications on cerebral hemodynamics. A hemodynamic model for the study of cerebral venous outflow was developed to investigate the correlations between extracranial blood redistributions and changes in the intracranial environment...
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