Peer-reviewed veterinary case report
Cardiopathological observation on a case of persistent ventricular tachycardia in a pony mare.
- Journal:
- The Journal of veterinary medical science
- Year:
- 1992
- Authors:
- Machida, N et al.
- Affiliation:
- Department of Veterinary Pathology · Japan
- Species:
- horse
Plain-English summary
A 20-year-old pony mare was found to have a serious heart condition called persistent ventricular tachycardia, which means her heart was beating too fast. After she passed away, a thorough examination of her heart showed that it was enlarged and had some unusual patches. One of these patches was a large area of scar-like tissue in a specific part of the heart, which could have contributed to the fast heartbeats. This type of damage can create conditions that lead to abnormal heart rhythms. Unfortunately, the findings suggest that the heart issues were significant and likely contributed to her condition.
Abstract
A 20-year-old pony mare with persistent ventricular tachycardia (VT) was examined cardiopathologically. At necropsy, the heart was enlarged and rounded with both ventricular dilatation. In a longitudinal section of the ventricular septum, a large grayish white patchy lesion (5 x 25 mm) was detected in the relatively higher portion. Microscopically, the lesion was extensive myocardial fibrosis located in the vicinity of the proximal part of the left bundle branch. Partially the fibrotic lesion was in contact with the branch. Such a lesion might play an important role in creating a suitable background for the development of VT via automaticity or reentry mechanism.
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Search related cases →Original publication: https://pubmed.ncbi.nlm.nih.gov/1477174/