Key result
Postmortem examination of two horses with unexpected cardiac death revealed arrhythmogenic right ventricular cardiomyopathy, characterized by fibroareolar replacement of the right ventricular endocardium.
Case Report (n=2)
Arrhythmogenic right ventricular cardiomyopathy, characterized by fibrofatty replacement of the myocardium, can be a cause of unexpected cardiac death in horses.
May prompt ARVC consideration in equine sudden death; hypothesis-generating pending larger studies.
Postmortem and histological examination of the hearts from two horses, a five-year-old Clydesdale gelding and a 15-year-old cob gelding, revealed changes characteristic of arrhythmogenic right ventricular cardiomyopathy. In both cases, on gross examination, the right ventricular endocardium and interventricular septum were almost entirely replaced with a gelatinous yellow fibroareolar tissue. This tissue was histologically a combination of fibrous and adipose tissue that had replaced the normal myofibres and disrupted the Purkinje fibres.
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Freel et al. (2010) conducted a case report in Arrhythmogenic right ventricular cardiomyopathy (n=2). Arrhythmogenic right ventricular cardiomyopathy was evaluated on Postmortem and histological findings. Postmortem examination of two horses with unexpected cardiac death revealed arrhythmogenic right ventricular cardiomyopathy, characterized by fibroareolar replacement of the right ventricular endocardium.
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