Experimental Study of Wall Pressure Fluctuations in a Pipe behind a Stenosis

Computational analysis of high frequency fluid–structure interactions in constricted flow

“…The cardiac cycle and the blood flow rate have a frequency on the order of 1 Hz. However, the frequencies of the wall pressure fluctuations are in the range of 20-1000 Hz [2]. Therefore the cardiac cycle has a considerably larger time scale compared with the pressure fluctuations present due to the stenosis.…”

“…The common method for diagnosing a stenosis is arteriography [2]. The basis of arteriography is the injection of an X-ray contrast agent into the body and obtaining the X-ray image, by which the place of stenosis and degree of narrowing can be detected.…”

“…First of all, it is an invasive method in which a catheter has to be placed close to the suspected location of the stenosis that may lead to bleeding or infection after the operation. Also, arteriography is applied when stenosis shows clinical symptoms [2,3]. Before the appearance of clinical symptoms, this method is not preferred, which means it is used to understand the degree of the disease, not to prevent it.…”