Abstract
The transmission of pressure pulse waves in elastic tubes and arteries has been discussed by previous workers but the dependence of the viscoelastic parameters on frequency has not been taken into account in detail. In this paper pulse wave transmission in a model of an infinitely long viscoelastic tube containing a viscous fluid has been expressed in a simple mathematical form with the use of complex variables. The experimentally observed frequency dependence of viscoelastic parameters of canine arteries has been expressed analytically and incorporated in the simulation. The transmission of the pressure pulses over a small distance is simulated assuming uniform properties of the vessel wall over this interval. Some of the observed changes due to transmission are explained by the simulation, for example the gradual disappearance of the dichrotic notch from the thoracic aorta to the smaller arteries. The results on normal dogs are sufficiently encouraging to attempt simulation of the pulse wave transmission in arteries in pathological conditions.
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