Risk factors for atrial fibrillation during racing in slow-finishing horses

Hajime Ohmura, Atsushi Hiraga, Toshiyuki Takahashi, Makoto Kai, James H Jones

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Objective - To determine prevalence of atrial fibrillation (AF) immediately after racing among racehorses that finished well behind the winners and examine potential risk factors for AF in these horses. Design - Case-control study. Animals - 39,302 racehorses representing 404,090 race starts in races sanctioned by the Japan Racing Association between 1988 and 1997. Procedure - Horses that finished ≥ 4 (turf races) or 5 (dirt races) seconds behind the winner or that did not complete the race were examined for AF within 5 minutes after the race. Logistic regression and χ2 analyses were used to determine whether sex, age, race distance, race surface, year, or development of epistaxis was associated with development of AF. Results - Estimated minimum frequency of AF was 0.03% (123 instances of AF following 404,090 race starts), and estimated minimum prevalence of AF among racehorses was 0.29% (115 horses with AF among 39,302 racehorses). Estimated frequency of AF among horses that finished slowly or did not finish was 1.39% (120 instances of AF among 8,639 examinations), and estimated prevalence of AF in horses that finished slowly was 1.23% (92 instances of AF among 7,500 horses) or 1.01% when only the first time a horse finished slowly was considered (76 instances of AF among 7,500 horses). Atrial fibrillation was paroxysmal in most horses. Among horses that finished slowly, 4-year-old and older horses and horses that raced on turf were more likely to develop AF Conclusions and Clinical Relevance - Results suggest that the likelihood of AF among racehorses that finish slowly is related to age and racing surface.

Original languageEnglish (US)
Pages (from-to)84-88
Number of pages5
JournalJournal of the American Veterinary Medical Association
Volume223
Issue number1
DOIs
StatePublished - Jul 1 2003

Fingerprint

Atrial Fibrillation
Horses
finishing
risk factors
horses
racehorses
atrial fibrillation
lawns and turf
Epistaxis
case-control studies
Case-Control Studies
Japan
Logistic Models

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Risk factors for atrial fibrillation during racing in slow-finishing horses. / Ohmura, Hajime; Hiraga, Atsushi; Takahashi, Toshiyuki; Kai, Makoto; Jones, James H.

In: Journal of the American Veterinary Medical Association, Vol. 223, No. 1, 01.07.2003, p. 84-88.

Research output: Contribution to journalArticle

Ohmura, Hajime ; Hiraga, Atsushi ; Takahashi, Toshiyuki ; Kai, Makoto ; Jones, James H. / Risk factors for atrial fibrillation during racing in slow-finishing horses. In: Journal of the American Veterinary Medical Association. 2003 ; Vol. 223, No. 1. pp. 84-88.
@article{ee16434f15724b5ca0e3784dd32d134c,
title = "Risk factors for atrial fibrillation during racing in slow-finishing horses",
abstract = "Objective - To determine prevalence of atrial fibrillation (AF) immediately after racing among racehorses that finished well behind the winners and examine potential risk factors for AF in these horses. Design - Case-control study. Animals - 39,302 racehorses representing 404,090 race starts in races sanctioned by the Japan Racing Association between 1988 and 1997. Procedure - Horses that finished ≥ 4 (turf races) or 5 (dirt races) seconds behind the winner or that did not complete the race were examined for AF within 5 minutes after the race. Logistic regression and χ2 analyses were used to determine whether sex, age, race distance, race surface, year, or development of epistaxis was associated with development of AF. Results - Estimated minimum frequency of AF was 0.03{\%} (123 instances of AF following 404,090 race starts), and estimated minimum prevalence of AF among racehorses was 0.29{\%} (115 horses with AF among 39,302 racehorses). Estimated frequency of AF among horses that finished slowly or did not finish was 1.39{\%} (120 instances of AF among 8,639 examinations), and estimated prevalence of AF in horses that finished slowly was 1.23{\%} (92 instances of AF among 7,500 horses) or 1.01{\%} when only the first time a horse finished slowly was considered (76 instances of AF among 7,500 horses). Atrial fibrillation was paroxysmal in most horses. Among horses that finished slowly, 4-year-old and older horses and horses that raced on turf were more likely to develop AF Conclusions and Clinical Relevance - Results suggest that the likelihood of AF among racehorses that finish slowly is related to age and racing surface.",
author = "Hajime Ohmura and Atsushi Hiraga and Toshiyuki Takahashi and Makoto Kai and Jones, {James H}",
year = "2003",
month = "7",
day = "1",
doi = "10.2460/javma.2003.223.84",
language = "English (US)",
volume = "223",
pages = "84--88",
journal = "Journal of the American Veterinary Medical Association",
issn = "0003-1488",
publisher = "American Veterinary Medical Association",
number = "1",

}

TY - JOUR

T1 - Risk factors for atrial fibrillation during racing in slow-finishing horses

AU - Ohmura, Hajime

AU - Hiraga, Atsushi

AU - Takahashi, Toshiyuki

AU - Kai, Makoto

AU - Jones, James H

PY - 2003/7/1

Y1 - 2003/7/1

N2 - Objective - To determine prevalence of atrial fibrillation (AF) immediately after racing among racehorses that finished well behind the winners and examine potential risk factors for AF in these horses. Design - Case-control study. Animals - 39,302 racehorses representing 404,090 race starts in races sanctioned by the Japan Racing Association between 1988 and 1997. Procedure - Horses that finished ≥ 4 (turf races) or 5 (dirt races) seconds behind the winner or that did not complete the race were examined for AF within 5 minutes after the race. Logistic regression and χ2 analyses were used to determine whether sex, age, race distance, race surface, year, or development of epistaxis was associated with development of AF. Results - Estimated minimum frequency of AF was 0.03% (123 instances of AF following 404,090 race starts), and estimated minimum prevalence of AF among racehorses was 0.29% (115 horses with AF among 39,302 racehorses). Estimated frequency of AF among horses that finished slowly or did not finish was 1.39% (120 instances of AF among 8,639 examinations), and estimated prevalence of AF in horses that finished slowly was 1.23% (92 instances of AF among 7,500 horses) or 1.01% when only the first time a horse finished slowly was considered (76 instances of AF among 7,500 horses). Atrial fibrillation was paroxysmal in most horses. Among horses that finished slowly, 4-year-old and older horses and horses that raced on turf were more likely to develop AF Conclusions and Clinical Relevance - Results suggest that the likelihood of AF among racehorses that finish slowly is related to age and racing surface.

AB - Objective - To determine prevalence of atrial fibrillation (AF) immediately after racing among racehorses that finished well behind the winners and examine potential risk factors for AF in these horses. Design - Case-control study. Animals - 39,302 racehorses representing 404,090 race starts in races sanctioned by the Japan Racing Association between 1988 and 1997. Procedure - Horses that finished ≥ 4 (turf races) or 5 (dirt races) seconds behind the winner or that did not complete the race were examined for AF within 5 minutes after the race. Logistic regression and χ2 analyses were used to determine whether sex, age, race distance, race surface, year, or development of epistaxis was associated with development of AF. Results - Estimated minimum frequency of AF was 0.03% (123 instances of AF following 404,090 race starts), and estimated minimum prevalence of AF among racehorses was 0.29% (115 horses with AF among 39,302 racehorses). Estimated frequency of AF among horses that finished slowly or did not finish was 1.39% (120 instances of AF among 8,639 examinations), and estimated prevalence of AF in horses that finished slowly was 1.23% (92 instances of AF among 7,500 horses) or 1.01% when only the first time a horse finished slowly was considered (76 instances of AF among 7,500 horses). Atrial fibrillation was paroxysmal in most horses. Among horses that finished slowly, 4-year-old and older horses and horses that raced on turf were more likely to develop AF Conclusions and Clinical Relevance - Results suggest that the likelihood of AF among racehorses that finish slowly is related to age and racing surface.

UR - http://www.scopus.com/inward/record.url?scp=0037870229&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037870229&partnerID=8YFLogxK

U2 - 10.2460/javma.2003.223.84

DO - 10.2460/javma.2003.223.84

M3 - Article

C2 - 12839069

AN - SCOPUS:0037870229

VL - 223

SP - 84

EP - 88

JO - Journal of the American Veterinary Medical Association

JF - Journal of the American Veterinary Medical Association

SN - 0003-1488

IS - 1

ER -