Hypertension
Studies from D. Chemla and colleagues provide new data on hypertension
Published in Cardiovascular Device Liability Week, May 4th, 2008
According to a study from Le Kremlin-Bicetre, France, "Total arterial stiffness plays a contributory role throughout aging and in numerous cardiovascular diseases, including hypertension. Aortic stiffening is responsible for an increased characteristic impedance (ie, the impedance to the left ventricular pulsatile flow), thus increasing the forward pressure-wave amplitude that contributes to pulse pressure elevation."
"Aortic stiffening also increases pulse wave velocity, and this results in anticipated and enhanced wave reflections, further augmenting central pulse pressure. Unfortunately, there is no simple time-domain estimate of characteristic impedance....
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