Atrial fibrillation management in a breeding stallion.

Heliczer, Natalie; Mitchell, K; Lorello, Olivia; Dauvillier, J; Burger, Dominik; Schwarzwald, C C; Navas de Solís, Cristobal (2017). Atrial fibrillation management in a breeding stallion. Journal of veterinary cardiology, 19(3), pp. 299-307. Elsevier 10.1016/j.jvc.2017.02.001

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A 20-year-old warmblood breeding stallion presented to a University practice for semen collection and evaluation was incidentally diagnosed with atrial fibrillation (AF). Electrocardiogram recordings during breeding revealed inappropriately rapid tachycardia and occasional ventricular premature depolarizations/aberrant ventricular conduction. Transvenous electrical cardioversion was performed. After successful cardioversion the horse displayed supraventricular ectopy and atrial contractile dysfunction and was administered sotalol hydrochloride in an attempt to decrease the risk of AF recurrence. Supraventricular ectopy and echocardiographic evidence of atrial dysfunction gradually improved and normalized over 6 months. No direct adverse effects of the chronic anti-arrhythmic treatment were observed and libido and semen quality were unaffected. AF recurred 6 months after cardioversion and sotalol therapy was continued to control the ventricular ectopy/aberrant ventricular conduction during semen collection. Considerations regarding pathologic arrhythmias and inappropriately high heart rates in breeding stallions with AF may be similar to those in riding horses. Sotalol hydrochloride was a safe anti-arrhythmic drug in the management of this case.

Item Type:

Journal Article (Further Contribution)


05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > ISME Equine Clinic Bern > ISME Equine Clinic, Internal medicine
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV)

UniBE Contributor:

Heliczer, Natalie, Lorello, Olivia, Burger, Dominik Cyrill, Navas de Solís, Cristobal


600 Technology > 630 Agriculture








Andrea Gassmann-Suter

Date Deposited:

26 Apr 2018 14:26

Last Modified:

02 Mar 2023 23:29

Publisher DOI:


PubMed ID:


Uncontrolled Keywords:

Atrial stunning Beta blocker Exercise arrhythmia Long-term anti-arrhythmic therapy




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