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Home / Equine Research Bank / J Am Vet Med Assoc / Association between exercise-induced pulmonary hemorrhage an...
Journal of the American Veterinary Medical Association2005; 227(5); 768-774; doi: 10.2460/javma.2005.227.768

Association between exercise-induced pulmonary hemorrhage and performance in Thoroughbred racehorses.

Abstract: To determine whether exercise-induced pulmonary hemorrhage (EIPH) was associated with racing performance inThoroughbred horses not medicated with furosemide and not using nasal dilator strips. Methods: Observational cross-sectional study. Methods: 744 two- to 10-year-old Thoroughbred horses racing in Melbourne, Australia. Methods: Horses were enrolled prior to racing, and a tracheobronchoscopic examination was performed after 1 race. Examinations were recorded on videotape, and presence and severity (grade 0 to 4) of EIPH were subsequently determined by 3 observers blinded to the horses' identity. Race records were abstracted for each horse examined. Results: Overall, 52.1% of horses eligible for participation in the study were examined, and horses that were examined did not differ from horses that were not examined in regard to age, sex distribution, or proportion of horses that won or finished in the first 3 positions. Horses with EIPH grades < 1 were 4.0 times as likely to win, 1.8 times as likely to finish in the first 3 positions, and 3.03 times as likely to be in the 90th percentile or higher for race earnings as were horses with grades > 2. Horses with EIPH grades > 1 finished significantly farther behind the winner than did horses without EIPH. However, odds that horses with grade 1 EIPH would win or finish in the first 3 positions were not significantly different from odds for horses without EIPH. Conclusions: Results suggest that EIPH is associated with impaired performance in Thoroughbred racehorses not medicated with furosemide and not using nasal dilator strips.
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Publication Date: 2005-09-24 PubMed ID: 16178399DOI: 10.2460/javma.2005.227.768Google Scholar: Lookup
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  • Journal Article
  • Research Support
  • Non-U.S. Gov't

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.

The research investigates the association between exercise-induced pulmonary hemorrhage (EIPH) and racing performance in Thoroughbred horses. The study finds that EIPH can negatively affect a horse’s performance, especially without the use of medication or specialized nasal dilator strips.

Research Methodology

  • The research was an observational cross-sectional study focused on Thoroughbred horses aged between two and ten years, competing in Melbourne, Australia.
  • A total of 744 horses were included in the study, each inspected before and after a race using a tracheobronchoscopic examination. This medical procedure evaluates the airways (bronchi) and the voice box (larynx).
  • The examinations were videotaped, and the existence and severity of EIPH (graded between 0 and 4) were identified by three observers who were not given information about the horses’ identities.
  • Horse racing records were also examined for each horse included in the study.

Findings

  • About 52.1% of the horses eligible for the study were examined. The demographics (age, sex) and racing performance (winning ratio, top-3 finish ratio) of the examined horses did not differ significantly from the non-examined ones.
  • Horses with minor EIPH (grading less than 1) were far more likely to win a race, finish in top-3, or earn higher race winnings (within the top 10% of earners) compared to those with severe EIPH (grading above 2).
  • Horses with EIPH grade of more than 1, finished significantly behind the winner compared to horses without EIPH.
  • However, the chances of horses with EIPH grade 1 winning or finishing in the top three were not significantly different from those horses without EIPH.

Conclusion

  • The study justifies the association of EIPH with impaired racing performance in Thoroughbred horses, particularly those not medicated with furosemide or those not using nasal dilator strips to ease breathing.

Cite This Article

APA
Hinchcliff KW, Jackson MA, Morley PS, Brown JA, Dredge AE, O'Callaghan PA, McCaffrey JP, Slocombe RE, Clarke AE. (2005). Association between exercise-induced pulmonary hemorrhage and performance in Thoroughbred racehorses. J Am Vet Med Assoc, 227(5), 768-774. https://doi.org/10.2460/javma.2005.227.768

Publication

Journal of the American Veterinary Medical Association
ISSN: 0003-1488
NlmUniqueID: 7503067
Country: United States
Language: English
Volume: 227
Issue: 5
Pages: 768-774

Researcher Affiliations

Hinchcliff, Kenneth W
  • Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA.
Jackson, Melissa A
    Morley, Paul S
      Brown, James A
        Dredge, Anthony E
          O'Callaghan, Paul A
            McCaffrey, John P
              Slocombe, Ronald E
                Clarke, Andrew E

                  MeSH Terms

                  • Animals
                  • Bronchoscopy / veterinary
                  • Cross-Sectional Studies
                  • Female
                  • Hemorrhage / physiopathology
                  • Hemorrhage / veterinary
                  • Horse Diseases / physiopathology
                  • Horses
                  • Lung Diseases / physiopathology
                  • Lung Diseases / veterinary
                  • Male
                  • Physical Conditioning, Animal / physiology
                  • Severity of Illness Index
                  • Videotape Recording

                  Citations

                  This article has been cited 15 times.
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