Short-term and long-term PQ, QT and R-R intervals’ variability at the resting condition and after exercise testing in healthy Anglo-Arabian horses.
Abstract: The duration of electrocardiographic (ECG) parameters: PQ, QT and R-R intervals change during long-term and short-term observation as the consequence of the fluctuations in autonomic nervous system activity among others dependent on the exercise and resting. There is no data of horse breed influence on these parameters. The aim of the study was to assess the duration and the variability of the PQ, QT and R-R intervals in the resting conditions and after exercise testing in Anglo-Arabian horses. Methods: 27 healthy Anglo-Arabian horses aged 3.4 +/- 1.0 years (15 male, 12 female) had ECG examination in the standing position using Einthoven system of leads. The longest and the shortest PQ, QT and R-R intervals were measured after night rest and after exercise testing and the means were calculated. Conclusions: 1) In Anglo-Arabian horses the difference between the longest and the shortest PQ interval at rest vs. after exercise is 0.06 +/- 0.05 vs. 0.03 +/- 0.02, QT interval is 0.04 +/- 0.03 vs. 0.04 +/- 0.04, R-R interval 0.19 +/- 0.15 vs. 0.08 +/- 0.11. 2) The PQ and R-R intervals reveal high short-term variability either at the resting conditions or after exercise testing. 3) After exercise testing PQ, QT and R-R intervals are shorter than at the resting conditions. The delta PQ and R-R are 2 times smaller in contrast to delta QT which is constant. 4) The PQ and R-R interval variability was greater at the baseline condition than after exercise testing. The QT variability was similar at baseline condition to that after exercise testing.
Publication Date: 2012-06-20 PubMed ID: 22708358DOI: 10.2478/v10181-011-0114-8Google Scholar: Lookup
The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
- Journal Article
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 examines how certain electrocardiographic (ECG) intervals (specifically PQ, QT, and R-R) vary in Anglo-Arabian horses during rest and after exercise. The study found that following exercise, these intervals were shorter than at rest, and that the variability of these intervals was generally higher during rest compared to after exercise.
Introduction and Objectives
- This research aimed to understand the duration and variability of certain electrocardiograph (ECG) parameters—PQ, QT, and R-R intervals—in Anglo-Arabian horses under resting conditions and after exercise testing.
- There was little prior data on how these parameters might be influenced by breed of the horse, hence this research targeted this gap.
Methods
- 27 healthy Anglo-Arabian horses (15 male, 12 female), averaging around 3.4 years, were examined using an ECG in a standing position, specifically with the Einthoven system of leads.
- The longest and shortest PQ, QT, and R-R intervals were measured both after night rest and after exercise testing. The average values of these intervals were then calculated for both conditions.
Results
- The disparities between the longest and shortest PQ, QT, and R-R intervals in resting and post-exercise conditions were quantified, revealing some distinct patterns.
- Post-exercise, all three intervals (PQ, QT, and R-R) were found to be shorter than in the resting state.
- The difference (delta) between PQ and R-R intervals after exercise was half of their resting state value, while the difference for the QT interval remained constant.
Conclusions
- Both at rest and after exercise, PQ and R-R intervals demonstrated a high degree of short-term variability, while QT interval variability was fairly stable.
- The variability of PQ and R-R intervals was seen to be higher at resting conditions compared to post-exercise. However, the variability in the QT interval was similar under both conditions.
Cite This Article
APA
Pasławska U, Zyśko D, Noszczyk-Nowak A, Pasławski R.
(2012).
Short-term and long-term PQ, QT and R-R intervals’ variability at the resting condition and after exercise testing in healthy Anglo-Arabian horses.
Pol J Vet Sci, 15(1), 55-59.
https://doi.org/10.2478/v10181-011-0114-8 Publication
Researcher Affiliations
- Department of Internal Diseases with Clinic for Horses, Dogs, and Cats, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, Pl. Grunwaldzki 47, 50-366 Wroclaw, Poland. urszula.paslawska@wp.pl
MeSH Terms
- Animals
- Electrocardiography / veterinary
- Exercise Test
- Female
- Horses / physiology
- Male
- Physical Conditioning, Animal / physiology
Use Nutrition Calculator
Check if your horse's diet meets their nutrition requirements with our easy-to-use tool Check your horse's diet with our easy-to-use tool
Talk to a Nutritionist
Discuss your horse's feeding plan with our experts over a free phone consultation Discuss your horse's diet over a phone consultation
Submit Diet Evaluation
Get a customized feeding plan for your horse formulated by our equine nutritionists Get a custom feeding plan formulated by our nutritionists
