Diagnostics of functional state of endothelium in athletes by the pulse wave

Abstract

The results of diagnosis of the arterial vascular system by the pulse wave recorded by the oscillometric method in a group of athletes engaged in rowing and having high sports categories, as well as the control group have been presented. The reaction of muscle tone to the occlusion of the brachial artery to determine the functional state of the endothelium was studied. To carry out screening diagnostics, we have proposed a method for assessing the functional state of the vascular system by the second derivative of the pulse wave amplitude. The algorithm of the digital signal processing of the pulse wave and the calculation of the index of the functional state of tone of the vascular system of the athletes has been developed. The pulse wave parameters were measured using a software and hardware complex based on the NI ELVIS station. The results of testing athletes for endothelial dysfunction were confirmed by duplex ultrasound scanning of the arterial bed on the device of expert class Philips HD 15 XE. The change in volumetric blood flow after reactive hyperemia was calculated relative to the initial value in two groups of patients. The correspondence between the reduction of the peak value of the volume blood flow obtained by duplex ultrasound scanning of the arterial bed and the reaction to the occlusion of the artery, leading to a decrease in the second derivative of the pulse wave amplitude, measured by the oscillometric method, was shown.