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Biomedical subjects

A A Talakov

Publications and source records attributed to A A Talakov.

14 recordsLinked to original sources
PubMed1980

[Measurement of the specific electrical resistance of the blood (rho) and its determination mathematically in dogs].

The role of specific electric resistance of blood (rho) in determining systolic cardiac volume by impedance plethysmography is discussed. It is pointed out that the known five mathematical equations for rho estimation by the hematocrit (Hct) and the temperature (T0) differ from one another and are moreover good for humans, but not for experimental animals. A suitable equipment and technique for direct (in vitro) measurement of rho is suggested. The obtained results enabled to deduce a mathematical dependence, allowing to determine the specific electric resistance of blood (rho) in dogs with sufficient accuracy, on the basis of the hematocrit and the temperature. The adequacy of this mathematical dependence for determination of rho in dogs has been confirmed by control studies.

Animals↗
PubMed1976

On the classification of ballistocardiograms.

An improvement of Brown's classification is described... The new classification reflects the amplitude and time-relation changes of the Bcg. A method for estimating the mean values of Bcg elements, based on the principle of calculation of all corresponding values during the complete 2-3 respiratory cycles is described

Ballistocardiography↗
PubMed1975

An improved classification of ballistocardiographic changes.

On the basis of a critical analysis of the most frequently used classifications of ballistocardiographic changes, an improved classification is proposed, which simultaneously respects the degree of pathological changes appraised according to Brown; the configurations and amplitudes of waves and segments, as well as their dependences on time. The proposed classification essentially accepts the symbols used in the classifications used up to the present, thus obviating errors and mistakes which the new classification might involve. The improved classification facilitates a better differentiation of first-degree pathological changes into those caused by disturbances of cardiovascular dynamics and those due to extracardial factors.

Ballistocardiography↗