Related Experiment Videos
Sustained supraventricular tachycardia in a horse
A J Guthrie1, E Nichas, F V Viljoen
1Department of Physiology, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, Republic of South Africa.
Journal of the South African Veterinary Association
|March 1, 1989
Summary
A young horse with sustained supraventricular tachycardia was successfully treated with quinidine sulphate. The treatment restored normal heart rhythm, allowing the horse to return to racing.
Area of Science:
- Veterinary Cardiology
- Equine Medicine
Background:
- Supraventricular tachycardia (SVT) is a cardiac dysrhythm that can affect athletic performance in horses.
- Idiopathic SVT in young horses presents a diagnostic and therapeutic challenge.
Observation:
- A two-year-old Thoroughbred filly presented with sustained SVT of unknown origin.
- The filly exhibited signs of cardiac dysrhythmia impacting her health and potential career.
Findings:
- Oral administration of quinidine sulphate effectively converted the SVT to sinus rhythm.
- Rhythm conversion occurred within 80 minutes of administering a 5g dose of quinidine sulphate.
- The filly tolerated the treatment well, with no reported adverse effects.
Implications:
- Quinidine sulphate offers a viable and effective treatment option for idiopathic SVT in young horses.
- Successful treatment enables a return to athletic function, preserving the horse's racing career.
- This case highlights the importance of prompt diagnosis and pharmacological intervention for equine cardiac arrhythmias.