{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,23]],"date-time":"2026-08-23T16:29:58Z","timestamp":1787502598621,"version":"build-2736575974"},"reference-count":19,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2014,7,17]],"date-time":"2014-07-17T00:00:00Z","timestamp":1405555200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"Pennsylvania Harness Horsemen's Association at Pocono Downs and Chester Downs"},{"name":"Meadows Standardbred Owners Association"}],"content-domain":{"domain":["beva.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Equine Veterinary Journal"],"published-print":{"date-parts":[[2015,7]]},"abstract":"<jats:title>Summary<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Reasons for performing study<\/jats:title>\n                    <jats:p>\n                      Cardiac arrhythmias are a recognised but poorly characterised problem in the\n                      <jats:styled-content style=\"fixed-case\">S<\/jats:styled-content>\n                      tandardbred racehorse. Frequency data could aid the development of cardiac arrhythmia screening programmes.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>\n                      To characterise the occurrence of cardiac arrhythmias in\n                      <jats:styled-content style=\"fixed-case\">S<\/jats:styled-content>\n                      tandardbreds prior to racing and in the late post race period using a handheld, noncontinuous recording device.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study design<\/jats:title>\n                    <jats:p>Prospective, observational study, convenience sampling.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      Noncontinuous electrocardiographic recordings were obtained over a 12 week period from\n                      <jats:styled-content style=\"fixed-case\">S<\/jats:styled-content>\n                      tandardbred horses competing at a single racetrack. Electrocardiograms were obtained before racing and between 6 and 29\u2009min after the race using a handheld recording device. Prevalence of arrhythmias was calculated for all horses and overall frequency of arrhythmias was calculated for race starts and poor performers. Univariate logistic regression analysis was used to identify risk factors for cardiac arrhythmias.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>A total of 8657 electrocardiogram recordings were obtained from 1816 horses. Six horses had atrial fibrillation after racing (prevalence = 0.11%, frequency = 0.14%), one horse had supraventricular tachycardia before racing (prevalence = 0.06%, frequency = 0.02%), and 2 horses had ventricular tachyarrhythmias after racing (prevalence = 0.06%, frequency = 0.05%). The frequency of atrial fibrillation among race starts with poor performance was 1.3\u20132.0%. Increasing age was a significant risk factor for the presence of atrial premature contractions before racing and atrial fibrillation and ventricular ectopy after racing.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>\n                      Both physiological and pathological cardiac arrhythmias can be detected in apparently healthy\n                      <jats:styled-content style=\"fixed-case\">S<\/jats:styled-content>\n                      tandardbred horses in the prerace and late post race period using noncontinuous recording methods. Future studies should examine cumulative training or racing hours as a risk factor for cardiac arrhythmia. The prevalence and frequency information may be useful for track veterinarians and regulatory personnel following trends in cardiac arrhythmias.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/evj.12299","type":"journal-article","created":{"date-parts":[[2014,5,13]],"date-time":"2014-05-13T00:09:10Z","timestamp":1399939750000},"page":"398-404","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":60,"title":["Occurrence of cardiac arrhythmias in\n                    <scp>S<\/scp>\n                    tandardbred racehorses"],"prefix":"10.1111","volume":"47","author":[{"given":"J.","family":"Slack","sequence":"first","affiliation":[{"name":"Department of Clinical Studies New Bolton Center University of Pennsylvania  USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R. 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