Key result
Abrupt deceleration in racehorses links to focal myocardial fibrosis near the SA node and microvascular sclerosis.
Observational (n=5)
No
Authors
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May implicate perinodal fibrosis in equine sudden deceleration; hypothesis-generating for arrhythmia mechanisms in racehorses.
Kiryu et al. (1991) conducted an observational in Abrupt deceleration of speed during a race, exercise-induced ventricular premature contractions, paroxysmal atrial fibrillation (n=5). Abrupt deceleration of speed during a race and exercise-induced arrhythmias was evaluated on Cardiopathological changes (myocardial fibrosis, fibroplastic lesions, microvascular sclerosis). Cardiopathological examination of 5 racehorses with abrupt deceleration during a race revealed focal myocardial fibrosis near the sinoatrial node, fibroplastic lesions, and microvascular sclerosis in all cases.
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