Sergej Evdokimov

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A device designed for studying the motion kinematics of locking elements in the artificial cardiac valves is described. The principle of its operation is based on the photoelectric registration with subsequent electronic differentiation of the electric displacement signal. The length of measurable linear displacement is 0+20 mm. The amplitudinal-frequency(More)
It has been shown that Bionics prostheses compare very favorably with bioprostheses based on rigid supporting frameworks. The advantages of the above prostheses lie in the fact that the supporting frameworks of changed stiffness used in their modelling possess damping capacities at minute physical loadings, which considerably improves the hydrodynamic(More)
LIKS-2 rotatable disk prostheses were tested in laboratories for wear, atraumatic performance, and hemodynamic efficacy. Accelerated tests on testing units demonstrated their high reliability and lasting performance. The values of drops in, pressure and regurgitation volumes were negligible. The late-term results (of up to 5 years) of using LIKS-2(More)
Transmyocardial laser revascularization was applied in 58 patients with ischemic heart disease. The objective criterion of the method efficiency was an increase in myocardium perfusion due to newly formed blood vessels under influence of laser irradiation. The laser treatment has improved cardiac function and general condition of the patients. The surgery(More)
According to the International Standard ISO 5840: 1990 the wear resistance test is a necessary step in the development and production of artificial heart valves (AHV). In developing the device, it is important that a reliable prediction is made of AHV longevity, as a number of specific problems appear that are connected with the results of tests, duration(More)
The main cause of cardiac valve bioprosthesis dysfunction is mechanical rupture of the cusps consequent upon the development of "fatigue" tensions and calcification of the biologic tissue. The technology of "Bionix" prostheses manufacturing implies prevention of these complications by means of supporting frameworks of variable rigidity (dumping stroke(More)