The incidence of significant arrhythmias in sport horses and knowledge about their exact influence on athletic performance need to be clarified. The aims of the present study are to report the prevalence of cardiac arrhythmias during maximal treadmill exercise in poorly performing Standardbreds, and to investigate the possible relationship of demographic, cardiac and performance indices on premature complexes (PCs). Electrocardiographic Holter recordings before, during and after treadmill exercise testing of 158 poorly performing Standardbreds were analyzed retrospectively. Fifty horses did not have any type of arrhythmia. One hundred and eight horses had at least one type of arrhythmia, such as sinus arrhythmia (8.2%), sinoatrial block (3.2%), second-degree atrioventricular block (33.5%), supraventricular PCs (7.6%), and ventricular PCs (48.1%). A multiple regression analysis showed weak evidence that the occurrence of premature complexes decreases as the minimum heart rate increases, and a tendency for these arrhythmias to increase with increasing age and maximum lactate concentration. Our results suggest that PCs are frequent in poorly performing Standardbred racehorses, but further studies are necessary to clarify their role and clinical significance.

Evaluation of cardiac arrhythmias before, during, and after treadmill exercise testing in oorly performing standardbred racehorses / E. Alberti, L. Stucchi, C.M. Lo Feudo, G. Stancari, B. Conturba, F. Ferrucci, E. Zucca. - In: ANIMALS. - ISSN 2076-2615. - 11:8(2021 Aug 16), pp. 2413.1-2413.12. [10.3390/ani11082413]

Evaluation of cardiac arrhythmias before, during, and after treadmill exercise testing in oorly performing standardbred racehorses

Alberti, Elena;Stucchi, Luca;Lo Feudo, Chiara Maria;Stancari, Giovanni;Conturba, Bianca;Ferrucci, Francesco;Zucca, Enrica
2021-08-16

Abstract

The incidence of significant arrhythmias in sport horses and knowledge about their exact influence on athletic performance need to be clarified. The aims of the present study are to report the prevalence of cardiac arrhythmias during maximal treadmill exercise in poorly performing Standardbreds, and to investigate the possible relationship of demographic, cardiac and performance indices on premature complexes (PCs). Electrocardiographic Holter recordings before, during and after treadmill exercise testing of 158 poorly performing Standardbreds were analyzed retrospectively. Fifty horses did not have any type of arrhythmia. One hundred and eight horses had at least one type of arrhythmia, such as sinus arrhythmia (8.2%), sinoatrial block (3.2%), second-degree atrioventricular block (33.5%), supraventricular PCs (7.6%), and ventricular PCs (48.1%). A multiple regression analysis showed weak evidence that the occurrence of premature complexes decreases as the minimum heart rate increases, and a tendency for these arrhythmias to increase with increasing age and maximum lactate concentration. Our results suggest that PCs are frequent in poorly performing Standardbred racehorses, but further studies are necessary to clarify their role and clinical significance.
premature complexes; Holter recording; Standardbred trotters; poor performance; plasma lactate
Settore VET/08 - Clinica Medica Veterinaria
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/862218
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