title: Changes in heart rate during electrical stimulation of the atrium in rainbow trout (Oncorhynchus mykiss) at low temperature
metadata.name: dc.contributor.author
metadata.value: Kibler, Natalya
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Nuzhny, Vladimir
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Shmakov, Dmitry
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2022-10-11T13:16:48Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2022-10-11T13:16:48Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2022-06
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Kibler, N., Nuzhny, V., and Shmakov, D. 2022.Changes in heart rate during electrical stimulation of the atrium in rainbow trout (Oncorhynchus mykiss) at low temperature. Bio. Comm. 67(2): 113–119. https://doi.org/10.21638/spbu03.2022.204
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu03.2022.204
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/38270
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: In this work, we investigated the effect of high heart rate (HR) in vivo on the
  electrical properties and pumping functions of the heart ventricle of the rainbow
  trout (Oncorhynchus mykiss) at low ambient temperatures. HR was altered
  by atrial pacing. The electrocardiogram (ECG) parameters and hemodynamic
  parameters of the heart ventricle of rainbow trout adapted to a temperature of
  5–7 °C were studied from the normal sinus rhythm (21.6 ± 4.9 bpm) to the maximum
  possible HR. Results show that a HR of about 60 bpm is the upper limit of
  the normal functional activity of the ventricle of the heart. An increase in heart
  rate up to 60 bpm leads to an increase in the PQ interval and QRS complex, a
  decrease in the QT interval on the ECG, and a violation of the rhythmic activity
  of the heart (i.e., the occurrence of extrasystole), as well as to a considerable
  change in the hemodynamic parameters of the ventricle of the heart and a decrease
  in its contractile properties. After a period of ventricular extrasystole for
  several minutes (10–15 min), the activity of the sinus node resumes but with a
  lower HR compared with the initial HR. The duration of the QRS complex recovers
  to the initial one, and the PQ and QT intervals increase. Maximum systolic
  pressure and end-diastolic pressure also return to their original values after extrasystolic
  contraction. After the experimental extrasystole, the phenomenon
  of the absence of an increase in HR is observed. The arising extrasystole probably
  has a functional nature and is one of the mechanisms of electromechanical
  homeostatic control in the heart.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: This work was conducted in the
  framework of the State Contract (the project
  “The mechanism of formation of electrical
  heterogeneity at different levels of the
  organization of the heart” (FUUU-2022-
  0068), 2022–2026).
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: en
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: St Petersburg State University
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Biological Сommunications;Volume 67; Issue 2
metadata.lang: -
metadata.name: dc.subject
metadata.value: heart rate
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: electrocardiogram
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: hemodynamics
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: heart ventricle
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: temperature
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: rainbow trout
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Changes in heart rate during electrical stimulation of the atrium in rainbow trout (Oncorhynchus mykiss) at low temperature
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 04.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/38270/1/04.pdf
resources.format: Adobe PDF
resources.size: 1,96 MB