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Home / Equine Research Bank / PLoS One / Effects of conditioning on the left ventricular function of ...
PloS one2024; 19(6); e0304724; doi: 10.1371/journal.pone.0304724

Effects of conditioning on the left ventricular function of young purebred Arabian horses.

Abstract: The effects of conditioning on cardiac function in young horses is still unknown. For this reason, this study evaluated the left ventricular (LV) function of young horses by echocardiography after six weeks of conditioning. Fourteen untrained young purebred Arabian horses were evaluated at rest and after a stress test (ST) before and after a six-week conditioning program. There was an increase in V4 (p < 0.001) after conditioning, as well as a reduction in both heart rate (HR) at rest and peak HR during the ST (p < 0.001). There was also a reduction in internal diameter, along with an increase in interventricular septal, free wall and mean thicknesses and LV mass (p < 0.05). After the ST, the conditioned animals showed higher values of velocity time integral, stroke volume, systolic and cardiac indices, ejection (ET) and deceleration times (DT), end-diastolic volume, time to onset of radial myocardial velocity during early diastole and time to peak of transmitral flow velocity, in addition to reduced pre-ejection period (PEP), PEP/ET ratio and mean velocity of circumferential fiber shortening (p < 0.05). The conditioning protocol promoted physiological adaptations that indicate an improvement in the animals' aerobic capacity associated with an enhanced left ventricular function.
Copyright: © 2024 Ramos et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Publication Date: 2024-06-03 PubMed ID: 38829873PubMed Central: PMC11146711DOI: 10.1371/journal.pone.0304724Google Scholar: Lookup
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Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

This research investigates the impact of a six-week conditioning program on the heart function of young Arabian horses. The results show potential physiological improvements in the horses’ aerobic capacity and enhanced heart performance.

Introduction to the Study

  • The research seeks to understand the effects of a six-week conditioning program on the left ventricular (LV) function of young purebred Arabian horses. The study aims to fill the knowledge gap regarding how conditioning affects cardiac function in young horses.

Methodology

  • Fourteen untrained young Arabian horses took part in the study. Their left ventricular function was observed at rest and after a stress test before and after completing the conditioning program.

Results

  • Following the conditioning program, an increase in V4 (a measure of cardiac output) was noted. Additionally, there was a reduction in both heart rate (HR) at rest and peak HR during the stress test.
  • Other significant physiological changes observed included reductions in internal diameter (the size of the left ventricle at rest), increases in interventricular septal (the wall separating the heart’s left and right ventricles), free wall and mean thicknesses (thickness of the walls of the left ventricle) and an increase in LV mass (the weight of the left ventricle).
  • After the stress test, the conditioned horses showed higher measures of circulation (velocity time integral, stroke volume, and systolic and cardiac indices), longer ejection (the period of time when the heart contracts to pump blood) and deceleration times (the time it takes for the heart to slow down after pumping blood), higher end-diastolic volume (the volume of blood in the left ventricle at the end of filling), more time to onset of radial myocardial velocity during early diastole and time to peak of transmitral flow velocity, in addition to a reduced pre-ejection period (the time from the start of the electrical system to the start of ejection) and pre-ejection period/ejection time ratio and a reduced mean velocity of circumferential fiber shortening (an index of heart contraction speed).

Conclusion

  • The research concludes that the six-week conditioning program led to advantageous physiological adaptations in the horses, suggesting an improvement in aerobic capacity and enhanced left ventricular function.

Cite This Article

APA
Ramos GV, Santos MM, Gava FN, de Lacerda-Neto JC. (2024). Effects of conditioning on the left ventricular function of young purebred Arabian horses. PLoS One, 19(6), e0304724. https://doi.org/10.1371/journal.pone.0304724

Publication

PloS one
ISSN: 1932-6203
NlmUniqueID: 101285081
Country: United States
Language: English
Volume: 19
Issue: 6
Pages: e0304724
PII: e0304724

Researcher Affiliations

Ramos, Gabriel Vieira
  • Department of Veterinary Clinics and Surgery, School of Agricultural and Veterinary Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil.
Santos, Maíra Moreira
  • Department of Veterinary Clinics and Surgery, School of Agricultural and Veterinary Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil.
Gava, Fábio Nelson
  • Department of Veterinary Clinics, State University of Londrina, Londrina, Paraná, Brazil.
de Lacerda-Neto, José Corrêa
  • Department of Veterinary Clinics and Surgery, School of Agricultural and Veterinary Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil.

MeSH Terms

  • Animals
  • Horses / physiology
  • Ventricular Function, Left / physiology
  • Physical Conditioning, Animal / physiology
  • Heart Rate / physiology
  • Echocardiography
  • Male
  • Female
  • Stroke Volume / physiology

Conflict of Interest Statement

The authors have declared that no competing interests exist.

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