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Changes in heart rate and heart rate variability as a function of age in Thoroughbred horses

Overview of attention for article published in Journal of Equine Science, January 2017
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Mentioned by

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2 tweeters

Citations

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3 Dimensions

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7 Mendeley
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Title
Changes in heart rate and heart rate variability as a function of age in Thoroughbred horses
Published in
Journal of Equine Science, January 2017
DOI 10.1294/jes.28.99
Pubmed ID
Authors

Hajime OHMURA, James H. JONES

Abstract

We investigated changes in heart rate (HR) and HR variability as a function of age in newborn foals to old Thoroughbred horses. Experiments were performed on a total of 83 healthy and clinically normal Thoroughbred horses. Resting HR decreased with age from birth. The relationship between age and HR fit the equation Y=48.2X(-0.129)(R(2)=0.705); the relationship between age and HR for horses 0-7 years old fit the equation Y=44.1X(-0.179)(R(2)=0.882). Seven-day-old horses had the highest HR values (106 ± 10.3 beat/min). The low frequency (LF) and high frequency (HF) powers increased with age in newborn to old horses. These changes in HR and HR variability appear to result from the effects of ageing. Three- to seven-year-old race horses had the lowest HR values (32.9 ± 3.5 beat/min) and the highest LF and HF powers except for the HF powers in the oldest horses. Race training may have contributed to these changes. Horses of ages greater than 25 years old had the highest HF powers and the lowest LF/HF ratios. In individual horses, 8 of the 15 horses over 25 years old had LF/HF ratios of less than 1.0; their HR variability appears to be unique, and they may have a different autonomic balance than horses of younger age.

Twitter Demographics

The data shown below were collected from the profiles of 2 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 7 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 7 100%

Demographic breakdown

Readers by professional status Count As %
Student > Bachelor 2 29%
Unspecified 1 14%
Researcher 1 14%
Professor 1 14%
Student > Master 1 14%
Other 1 14%
Readers by discipline Count As %
Veterinary Science and Veterinary Medicine 3 43%
Agricultural and Biological Sciences 2 29%
Unspecified 1 14%
Medicine and Dentistry 1 14%

Attention Score in Context

This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 22 September 2017.
All research outputs
#6,990,470
of 11,809,688 outputs
Outputs from Journal of Equine Science
#24
of 50 outputs
Outputs of similar age
#137,903
of 267,909 outputs
Outputs of similar age from Journal of Equine Science
#2
of 4 outputs
Altmetric has tracked 11,809,688 research outputs across all sources so far. This one is in the 40th percentile – i.e., 40% of other outputs scored the same or lower than it.
So far Altmetric has tracked 50 research outputs from this source. They receive a mean Attention Score of 1.9. This one scored the same or higher as 26 of them.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 267,909 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 47th percentile – i.e., 47% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 4 others from the same source and published within six weeks on either side of this one. This one has scored higher than 2 of them.