Heart Electrical Activity during Ventricular Repolarization in Subjects with Different Resistances to Hypoxia
- Authors: Zamenina E.V.1, Panteleeva N.I.1, Roshchevskaya I.M.2
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Affiliations:
- Komi Scientific Centre of the Ural Branch, Russian Academy of Sciences
- Pitirim Sorokin Syktyvkar State University
- Issue: Vol 45, No 6 (2019)
- Pages: 634-641
- Section: Article
- URL: https://journals.rcsi.science/0362-1197/article/view/178344
- DOI: https://doi.org/10.1134/S0362119719050207
- ID: 178344
Cite item
Abstract
The study of the electrical activity of the heart during ventricular repolarization period of healthy subjects with different resistances to oxygen deficiency to exposure of normobaric hypoxic hypoxia (12.3% O2) has been carried out using the simultaneous recording of the heart electrical unipolar potentials from a variety of leads on the body surface. It was revealed that in subjects with different resistances to a hypoxic stimulus the correlation of change in QT, J-TpeakII and Tpeak-TendII intervals under the influence of acute hypoxia was different: in subjects with a high resistance to hypoxia the decrease in the QT interval corresponded to the decrease in ventricular late repolarization duration, and in subjects with low resistance to hypoxia the decrease in the QT interval corresponded to the periods of early and late repolarization. The analysis of the cardioelectric field on the body surface of subjects with different resistances to a hypoxic stimulus revealed a statistically significant decrease in temporal characteristics of maximum cardioelectric potentials while amplitude characteristics remained practically unchanged independently of resistance to hypoxia.
About the authors
E. V. Zamenina
Komi Scientific Centre of the Ural Branch, Russian Academy of Sciences
Author for correspondence.
Email: e.mateva@mail.ru
Russian Federation, Syktyvkar
N. I. Panteleeva
Komi Scientific Centre of the Ural Branch, Russian Academy of Sciences
Email: e.mateva@mail.ru
Russian Federation, Syktyvkar
I. M. Roshchevskaya
Pitirim Sorokin Syktyvkar State University
Email: e.mateva@mail.ru
Russian Federation, Syktyvkar