Sergej Evdokimov

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Reparative and adaptive processes in the myocardium after irradiation with a high-intensity Nd:YAG laser are accompanied by an increase in the number of blood vessels in the damage-adjacent and remote areas. The results obtained indicate that laser revascularization of the myocardium can be employed in the treatment of some forms of ischemic heart disease.
Some experimental results when studying self-sustained vibrations of the ball locking element for an artificial heart valve are presented. The sign-changing dependence of a ball drag coefficient upon the ball stroke has been shown to cause these vibrations. Undamped oscillations result in a considerable growth of the valve hydrodynamic resistance.
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)
Experimental, pathomorphological and clinical data substantiating use of transmyocardial laser revascularisation in the treatment of coronary heart disease (CHD) are presented. It is shown that the objective criterion of clinical efficacy of transmyocardial laser revascularisation in 58 patients with CHD is an increase of myocardial perfusion due to(More)
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)