Biomedical subjects
Publications and source records attributed to P P Stirbis.
The analysis of the data available in the literature has shown that bipolar pacing systems are promising. The paper indicates that the first samples of a Soviet bipolar electrode have been made and tested in the laboratory setting. It also raises whether it is necessary to design bipolar pacemakers.
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Medical and occupational rehabilitation following pacemaker implantation is discussed with special reference to objective quality of medical and technical data, on which occupational recommendations are to be based. A comprehensive analysis of whether an individual with an implanted pacemaker can drive a car is presented.
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Some clinical device for the assessment of the sensitivity of the implanted demand-type cardiostimulator to bioelectric potentials are described. A relationship is demonstrated between the perception of bioelectric noise (muscular potentials) and sensitivity of the cardiostimulator.
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A pacing electrode with a porous surface saturated with glucocorticoids has been designed in order to diminish the pacing threshold of the heart. The data obtained in animal studies show that saturation of the electrode with dexamethasone before implantation significantly reduces the pacing threshold.
The data on 1050 patients with implanted electric pace-makers are summarized, and the diagnostic and practical value of changes in the frequency of pulses they generate is discussed.
The authors present the data of the histological structure of the dog heart tissue adjacent to the electrode tip following a ten-month period of electrical stimulation by means of an implanted graphited porous endocardial electrode and a pacemaker of the alternating polarity. The reason for performing such an histological investigation was an extremely low chronic threshold of heart electrostimulation, amounting to 0.35 V with the stimulus duration 1 ms. The structural features of the tissues as viewed by the authors, consist in (1) the thinning of the fibrous capsule of the electrode tip; (2) the presence of a zone adjacent to the electrode, with this zone being rich in the liquid component of the intercellular substance; (3) the formation of a conspicuous radix of the fibrous capsule, penetrating into the depth of the myocardium.
The first clinical experience of the successful application of electrostimulation of the atrial septum is described. Sickle-shaped electrodes were used for this purpose. Electrostimulation of the atrial septum was medically indicated in all cases. In 2 cases the electrode was fixed to the atrial septum after open-heart surgery and in 3 cases it was done because of an excessively high threshold of cardiac electrostimulation. Sickle-shaped electrodes are shown to be the most optimal for continuous electrostimulation of the atrial septum.
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Explore the source record for details and available documents.