Sustained supraventricular tachycardia in a horse.

This study revolves around a case of a young Thoroughbred filly affected by a rare cardiac disorder known as supraventricular tachycardia. The horse was successfully treated with quinidine sulphate and was able to return to racing.

About the Study

• The study focussed on a unique case of a two-year-old Thoroughbred filly presenting with supraventricular tachycardia, a cardiac disorder not commonly seen in horses.
• The cause of this heart condition in the filly remained unknown and is referred to as ‘of unknown aetiology’.

Treatment Used

• To manage this cardiac dysrhythmia, the researchers used quinidine sulphate, which is a medication often used to treat heart arrhythmias.
• It was administered orally with an initial dose of 5g.

Results and Aftermath

• Interestingly, it was observed that the horse’s heart rhythm returned to normal (sinus rhythm) approximately 80 minutes after the administration of the quinidine sulphate.
• After about 2 months following the successful treatment, the horse was able to return to its training regimen.
• In addition to regaining its health, the horse was able to return to racing successfully, indicating the efficacy of the treatment plan and the horse’s strong recovery.