PubMed Health⌕ Search

Biomedical subjects

B A Guseĭnov

Publications and source records attributed to B A Guseĭnov.

4 recordsLinked to original sources
PubMed1990

[Body impedance recording in the assessment of stroke volume].

The first derivative of the integral tetrapolar rheogram of the body, body impedance recording, was found to show changes in blood flow in the arterial compression chamber. Evidence was given for a close relation of the distance between the electrodes while recording an integral rheogram of the body and the examinees' height. The relation of the distance to the examinees' height was equal in males and females and proved to be lower than that previously applied. For calculation of the stroke blood volume from the body impedance recording, the Kubicek equation was proposed to be used by introducing the height of an examinee instead of the distance between measuring electrodes. There was a good coincidence of results while calculating the stroke volume by impedance recording and Doppler echocardiography.

Adolescent↗
PubMed1989

[Accuracy of the rheographic method of evaluating stroke volume].

The results of stroke volume determination by means of integral tetrapolar body rheography (ITBR) and M-echocardiography were compared in 78 individuals, while Doppler cardiography was used as the reference method. Fairly high accuracy of stroke volume measurement by ITBR and its advantages over echocardiography, particularly the possibility of calculating the stroke volume irrespective of the heart size, are demonstrated. The accuracy of the ITBR determination declines in patients with severe heart failure.

Adolescent↗
PubMedDate not supplied

[Tetrapolar modification of integral body impedance plethysmography].

A decrease in the amplifying ratio of inlet high-frequency amplifiers makes it possible to use PPG2-02 apparatus for tetrapolar modification of integral body impedance plethysmography (IBIP) without the currently used accessory device - divider. In 15 subjects impedance was measured using PPG-01 apparatus in the modification of M. I. Tischenko (intended for bipolar IBIP) or PPG2-02 apparatus. A direct close correlation (r = 0.982) has been established between impedance value, as measured by PPG2-02 apparatus and calculated according to linear regression equation, and impedance value, as measured by PPG2-02 apparatus. Mean deviation of the impedance value measured by PPG2-02 apparatus from that measured by PPG-01 apparatus was 2.8% and did not exceed 6%. The impedance value measured may be used for the determination of the cardiac output and extracellular fluid volume according to M. I. Tishchenko's formulas.

Humans↗