Peer-reviewed veterinary case report
Power spectral analysis of heart rate variability in a horse with atrial fibrillation.
- Journal:
- The Journal of veterinary medical science
- Year:
- 1998
- Authors:
- Kuwahara, M et al.
- Affiliation:
- Department of Comparative Pathophysiology · Japan
- Species:
- horse
Plain-English summary
This study looked at a horse with atrial fibrillation, which is an irregular heartbeat. They found that the horse had a significant increase in certain heart rate measurements compared to normal horses. Specifically, the horse showed a strong high-frequency signal, indicating that its heart rhythm was influenced by breathing patterns. The results suggest that the horse's heart is being affected by its nervous system in a way that might help regulate its heartbeat during the atrial fibrillation. Overall, the findings provide insights into how this horse's heart functions under these conditions.
Abstract
This study has demonstrated the power spectral analysis of heart rate variability in a horse with atrial fibrillation. A large peak in the high frequency (HF) area of the power spectrum appeared in the horse. Hourly heart rate, the low frequency (LF) power, the HF power, and LF/HF ratio were almost constant during the recording period. The values of HF and LF power in the horse with atrial fibrillation were much larger than those in normal horses. The normalized unit of HF (HF n.u.) was much larger than that of LF (LF n.u.). Furthermore, the LF/HF ratio was very small in the horse. These results suggest that the ventricular rhythm has a respiratory related periodicity in the horse with atrial fibrillation and the predominant parasympathetic activity may modulate the intrinsic behavior of the atrioventricular node during atrial fibrillation.
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Search related cases →Original publication: https://pubmed.ncbi.nlm.nih.gov/9492370/