Development of an atrial transseptal puncture procedure in horses to access the left heart: An ultrasound-guided jugular vein and transhepatic approach.
Abstract: Radiofrequency ablation has been successfully applied to treat right atrial arrhythmias in horses. Ablation of left-sided arrhythmias requires a retrograde transarterial approach which is complicated. In human medicine, the left atrium is accessed through transseptal puncture (TSP) of the fossa ovalis (FO) using a caudal approach via the femoral vein. Objective: To develop a zero fluoroscopy TSP technique for horses using a jugular vein (cranial) and transhepatic (caudal) approach. Methods: In vivo experimental study. Methods: Transseptal puncture was performed in 18 horses admitted for euthanasia and donated for scientific research under general anaesthesia: using a jugular vein approach (10 horses), a transhepatic approach (2 horses) or both (6 horses). Radiofrequency energy was applied on a guidewire to perforate the FO and allow sheath advancement under intracardiac and transthoracic echocardiographic guidance. Puncture lesions were inspected post-mortem. Results: Transseptal puncture was successful in 17/18 horses, of which 15/16 jugular vein approaches and 5/8 transhepatic approaches. Failure was due to technical malfunction, inability to advance the guidewire toward the heart and inability to advance the sheath through the FO. Intracardiac echocardiography was essential to safely guide the puncture process. Atrial arrhythmias caused by the TSP occurred in 13/18 horses. Puncture lesions were found in the right atrium in the FO region, and left atrium ventral to pulmonary vein ostium III. Conclusions: Because in several horses two approaches were tested consecutively, it cannot be excluded that the second TSP was performed at the previous puncture site. Due to the developmental nature of the study the approaches were not randomised and did not allow comparison. Conclusions: Transseptal puncture is feasible in horses using ultrasound guidance and allows for electrophysiological exploration of the left heart. Further studies are needed to evaluate post-operative follow-up.
© 2024 EVJ Ltd.
Publication Date: 2024-03-24 PubMed ID: 38522423DOI: 10.1111/evj.14084Google Scholar: Lookup
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Summary
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This research conducted an experimental study to develop a method for performing a left-sided heart access procedure, known as a transseptal puncture, in horses. The study successfully established a technique using ultrasound guidance with both a cranial (jugular vein) approach and caudal (transhepatic) approach.
Methodology
- The study was conducted on 18 horses that were under general anesthesia. These horses were admitted for euthanasia and donated for scientific research.
- The research team experimented with two methods of accessing the left atrium of the horse’s heart – via the jugular vein (10 horses) and a transhepatic approach (2 horses), and in some cases, they used both approaches (6 horses).
- To perforate the fossa ovalis (FO) and allow access to the left atrium, radiofrequency energy was applied on a guidewire, guided by both intracardiac and transthoracic echocardiographic imaging.
- Post-euthanasia, puncture lesions were examined for further investigation.
Results
- Transseptal puncture was successful in 17 out of 18 horses. In terms of the methods employed, 15 out of 16 attempts using the jugular vein approach met with success, and in the case of the transhepatic approach, 5 out of 8 attempts were successful.
- The reasons for failure were mainly due to technical issues, like the inability to advance the guidewire toward the heart or failure to navigate the sheath through the FO.
- Intracardiac echocardiography proved critical in the safe and accurate execution of the transseptal puncture process.
- It was observed that the TSP procedure induced atrial arrhythmias in 13 out of 18 horses. Post-mortem examinations revealed puncture lesions in the right atrium in the FO region, and in the left atrium ventral to the third pulmonary vein ostium.
Conclusions
- The study highlighted a possibility of correlation between the two approaches, as in a few horses, both techniques were performed sequentially – this could lead to the second TSP being performed at the first puncture site. The researchers indicate that due to the developmental nature of the study, approaches were not randomised and thus a direct comparison could not be made.
- Overall, the research demonstrated the feasibility of performing a transseptal puncture in horses using ultrasound guidance for access to the left heart. However, the researchers recommend further studies for evaluating the post-operative conditions and outcomes.
Cite This Article
APA
Vernemmen I, Van Steenkiste G, Buschmann E, Cornelis K, Schauvliege S, Ibrahim L, Decloedt A, van Loon G.
(2024).
Development of an atrial transseptal puncture procedure in horses to access the left heart: An ultrasound-guided jugular vein and transhepatic approach.
Equine Vet J, 57(1), 243-255.
https://doi.org/10.1111/evj.14084 Publication
Researcher Affiliations
- Equine Cardioteam Ghent, Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium.
- Equine Cardioteam Ghent, Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium.
- Equine Cardioteam Ghent, Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium.
- Cardiology Department, Maria Middelares Heart Centre, Ghent, Belgium.
- Department of Surgery and Anaesthesiology of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium.
- Department of Morphology, Imaging, Orthopedics, Rehabilitation and Nutrition, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium.
- Equine Cardioteam Ghent, Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium.
- Equine Cardioteam Ghent, Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium.
MeSH Terms
- Animals
- Horses
- Jugular Veins / surgery
- Punctures / veterinary
- Punctures / methods
- Heart Atria / surgery
- Female
- Male
- Horse Diseases / surgery
Grant Funding
- 1S71521N / Fonds Wetenschappelijk Onderzoek
- 1SE9122N / Fonds Wetenschappelijk Onderzoek
- 01B05818 / Bijzonder Onderzoeksfonds UGent
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