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Relationship between atrial fibrillatory rate based on analysis of a modified base-apex surface electrocardiogram analysis and the results of transvenous electrical cardioversion in horses with spontaneous atrial fibrillation.
Abstract: To compare the atrial fibrillatory rate (AFR) derived from a local right atrial intracardiac recording (RA-FR) and from a single-lead surface electrocardiogram (ECG) during atrial fibrillation (AF) and to evaluate the correlation with transvenous electrical cardioversion (TVEC) threshold (in Joules), number of shocks and cardioversion success rate in horses. Methods: ECGs and clinical records of horses with AF treated by TVEC. Horses were included if a simultaneous recording of the right atrial intracardiac electrogram and a modified base-apex ECG were available. Methods: Clinical records of horses with AF treated by TVEC were reviewed. Three-minute long episodes of simultaneous electrograms and surface ECG during AF were selected for analysis and compared using Bland-Altman analysis. The mean RA-FR was measured from the deflections on the intracardiac electrogram, while the AFR was extracted from the surface ECG using spatiotemporal QRS and T-wave cancellation. Results: Seventy-three horses satisfied the inclusion criteria. The mean difference between RA-FR and AFR was -13 fibrillations per minute (fpm), the 95% limits of agreement were between -66 and 40 fpm, and there was a moderate (ρ = 0.65) correlation between RA-FR and AFR (p < 0.001). Neither RA-FR nor AFR appeared to influence the TVEC cardioversion threshold or the number of TVEC shocks applied. Conclusions: The AFR may allow non-invasive long-term monitoring of AF dynamics. Neither RA-FR nor AFR could be used to predict the minimal defibrillation threshold for TVEC.
Copyright © 2021 Elsevier B.V. All rights reserved.
Publication Date: 2021-01-11 PubMed ID: 33611234DOI: 10.1016/j.jvc.2021.01.001Google Scholar: Lookup The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
- Journal Article
- Atrial Function
- Cardiac Arrhythmias
- Cardiovascular Health
- Clinical Examination
- Clinical Findings
- Clinical Pathology
- Clinical Study
- Diagnosis
- Diagnostic Imaging
- Diagnostic Technique
- Disease Diagnosis
- Disease Treatment
- Echocardiography
- Electrocardiography
- Equine Health
- Heart
- Heart Rate
- Horses
- Veterinary Medicine
- Veterinary Practice
- Veterinary Procedure
Summary
This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.
The research article delves into a comparative study of the atrial fibrillatory rate derived from a local right atrial intracardiac recording and a single-lead surface electrocardiogram during atrial fibrillation in horses. The purpose is to find any correlation with transvenous electrical cardioversion threshold, the number of shocks and the success rate of the cardioversion.
Methods
- The researchers examined ECGs and clinical records of horses suffering from atrial fibrillation (AF) that had been treated with transvenous electrical cardioversion (TVEC).
- The study only included those horses for which a simultaneous recording of the right atrial intracardiac electrogram and a modified base-apex ECG was accessible.
- The research team selected three-minute long episodes of simultaneous electrograms and surface ECG during AF for analysis. The comparison was carried out using Bland-Altman analysis.
- The mean RA-FR (fibrillatory rate from right atrial intracardiac recording) was calculated from the deflections on the intracardiac electrogram. Conversely, the AFR (atrial fibrillatory rate from a single-lead surface ECG) was extracted from the surface ECG using spatiotemporal QRS and T-wave cancellation.
Results
- A total of 73 horses fulfilled the criteria for inclusion in the study. The average difference between RA-FR and AFR was found to be -13 fibrillations per minute (fpm).
- The 95% limits of agreement were between -66 and 40 fpm. A moderate correlation (ρ = 0.65) was found between RA-FR and AFR (p < 0.001).
- The researchers observed that neither RA-FR nor AFR appeared to influence the TVEC cardioversion threshold or the number of TVEC shocks applied during treatments.
Conclusions
- The results suggest that AFR might facilitate non-invasive long-term monitoring of AF dynamics in horses.
- Furthermore, neither RA-FR nor AFR could be utilized as predictive measures for determining the minimal defibrillation threshold for TVEC, indicating a lack of their practical application in tailoring AF treatment strategies.
Cite This Article
APA
Van Steenkiste G, Carlson J, Decloedt A, Vera L, Buhl R, Platonov PG, van Loon G.
(2021).
Relationship between atrial fibrillatory rate based on analysis of a modified base-apex surface electrocardiogram analysis and the results of transvenous electrical cardioversion in horses with spontaneous atrial fibrillation.
J Vet Cardiol, 34, 73-79.
https://doi.org/10.1016/j.jvc.2021.01.001 Publication
Researcher Affiliations
- Equine Cardioteam, Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium. Electronic address: Glenn.VanSteenkiste@ugent.be.
- Department of Cardiology, Lund University, 21185 Lund, Sweden.
- Equine Cardioteam, Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium.
- Equine Cardioteam, Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium.
- Department of Veterinary Clinical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Højbakkegaard Allé 5, 2630 Taastrup, Denmark.
- Arrhythmia Clinic, Skåne University Hospital and Department of Cardiology, Clinical Sciences, Lund University, 21185 Lund, Sweden.
- Equine Cardioteam, Department of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium.
MeSH Terms
- Animals
- Atrial Fibrillation / therapy
- Atrial Fibrillation / veterinary
- Electric Countershock / veterinary
- Electrocardiography / veterinary
- Heart Atria
- Horse Diseases / therapy
- Horses
Conflict of Interest Statement
Conflicts of interest None of the authors have any conflicts of interest or financial ties to disclose.
Citations
This article has been cited 4 times.- Wu Q, Wu X, Feng T, Chen F, Ren J, Gao S, Wang B, Li Y, Gong L. Animal and cellular models of atrial fibrillation: a review. Front Cardiovasc Med 2025;12:1617652.
- Vernemmen I, Van Steenkiste G, Dufourni A, Decloedt A, van Loon G. Transvenous electrical cardioversion of atrial fibrillation in horses: Horse and procedural factors correlated with success and recurrence. J Vet Intern Med 2022 Mar;36(2):758-769.
- Buhl R, Hesselkilde EM, Carstensen H, Hopster-Iversen C, van Loon G, Decloedt A, Van Steenkiste G, Marr CM, Reef VB, Schwarzwald CC, Mitchell KJ, Nostell K, Nogradi N, Nielsen SS, Carlson J, Platonov PG. Atrial fibrillatory rate as predictor of recurrence of atrial fibrillation in horses treated medically or with electrical cardioversion. Equine Vet J 2022 Nov;54(6):1013-1022.
- Li Q, Su B, Liu J. Diagnostic values of different ECG durations in paroxysmal AF diagnosis. Ann Noninvasive Electrocardiol 2022 Mar;27(2):e12921.
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