Why the study?
Accelerated idioventricular rhythms are increasingly diagnosed in horses, especially with underlying systemic disease, making their recognition and appropriate management important.
Accelerated idioventricular rhythms in horses often resolve with improvement of underlying systemic disease and typically do not require specific antiarrhythmic treatment unless hemodynamically significant.
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AIVR in horses with systemic disease rarely needs specific therapy; leaves open optimal management for hemodynamically unstable cases.
Summary Accelerated idioventricular rhythms (AIVR) are increasingly diagnosed in horses, particularly in those with underlying systemic disease. Recognition of these abnormal rhythms is important but specific treatment is often not necessary unless the rhythms become haemodynamically relevant, with AIVR often resolving as the systemic disease improves. The goals of treatment, when indicated, include improving cardiac output, decreasing systemic and myocardial inflammation (if present) and controlling the ventricular rate and rhythm. Identification of any persistent myocardial damage or arrhythmia burden will be important for the prognosis and risk assessment of these patients in the longer term.
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Louie et al. (2023) studied this question.
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