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Biomedical subjects

S V Nesterov

Publications and source records attributed to S V Nesterov.

9 recordsLinked to original sources

Decrease in cardiac stroke volume in humans during inhalations of 8% hypoxic gas mixture.

The effect of 15-min inhalation of 8% hypoxic gas mixture on stroke volume was studied in 17 healthy volunteers. The parameter decreased in all volunteers who endured this exposure to the end. At the beginning of exposure the decrease in stroke volume negatively correlated with HR changes, but this correlation disappeared as hypoxia augmented. Physiological significance of stroke volume decrease during severe hypoxia is discussed.

Administration, Inhalation↗

Pulsometric study of the functional state of cardiovascular system under conditions provoking neurogenic syncopes.

The effects of passive and active orthostatic loads on the amplitude and temporal parameters of pulse waves were studied using an original computer assisted method of differential sphygmomanometry. Changes in the cardiac rhythm reflecting impairment of the autonomic regulation of the circulatory system and preceding neurogenic cardiovascular syncope were revealed and evaluated. Comparative analysis revealed similarity between these changes under conditions of both passive and active orthostasis, which confirmed the diagnostic value of differential sphygmomanometry.

Adenosine Triphosphate↗

[Effect of the heterogeneity of persons vaccinated, with respect to the state of their immune system, on the intensity of the immune response].

Prior to the immunization of children aged 3-7 years with parotitis vaccine the state of their immune system was evaluated by the determination of the concentration of IgM, IgG and IgA, the ratio and absolute numbers of T- and B-lymphocytes, the intensity of the blast transformation of lymphocytes. This study revealed that the group of immunized children was essentially heterogeneous with respect to the state of their immune system: in 79.9% of the children all immunological characteristics were normal, in 20.1% of the children some deviations from the characteristics considered to be normal for their age (gammopathy, eosinophilia, the deficiency of T- and B-lymphocytes, a decrease in the intensity of their blast transformation, the leftward shift of the leukocytic formula) were noted. The intensity of humoral immune response in children with deviations from normal characteristics peculiar to their age was significantly lower than in children with normal immunological characteristics. On the basis of these results, the immunological rehabilitation of the risk group among the children to be immunized is recommended.

Antibodies, Viral↗