Double outlet right ventricle with subpulmonary ventricular septal defect (Taussig-Bing anomaly) and other complex congenital cardiac malformations in an American Quarter Horse foal.
Abstract: A 4-week-old American Quarter Horse colt presented with a recent history of diarrhea and decreased activity level. On initial physical examination, the animal was bright and alert and major findings were limited to a loud systolic heart murmur radiating widely over both sides of the thorax. While in the hospital, the clinical condition of the foal warranted further imaging to determine the cause and extent of cardiac disease. A variety of congenital cardiac malformations were identified during echocardiographic examination and autopsy, including a double outlet right ventricle and a subpulmonary interventricular septal defect (Taussig-Bing anomaly), ventricular inversion with atrioventricular discordance, tricuspid valve atresia, a septum primum interatrial septal defect, mitral valve dysplasia with a cleft in the septal mitral valve cusp, aortic, and subaortic stenosis, tubular hypoplasia of the ascending aorta and the aortic arch, a patent ductus arteriosus, an aberrant circumflex coronary artery, and aberrant left and right subclavian arteries. Echocardiographic and postmortem findings of the cardiac defects in this foal are presented and discussed.
Copyright © 2017 Elsevier B.V. All rights reserved.
Publication Date: 2017-11-22 PubMed ID: 29174590DOI: 10.1016/j.jvc.2017.10.005Google Scholar: Lookup
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Summary
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The research article presents a study of a 4-week-old American Quarter Horse foal diagnosed with multiple complex congenital heart defects. The study is based on echocardiographic examination and autopsy findings.
Background and Initial Examination
- The case study begins with an American Quarter Horse foal that was brought in for a check-up due to a recent history of diarrhea and decreased activity levels.
- Upon initial physical examination, the foal appeared bright and alert with the major finding being a loud systolic heart murmur radiating over both sides of the thorax.
Echocardiographic Examination
- Due to the foal’s condition, further investigative measures were taken which included an echocardiographic examination. This is a test that uses ultrasound to generate images of the cardiovascular system to identify possible issues.
- Through this, multiple congenital cardiac malformations were discovered including a double outlet right ventricle and a subpulmonary interventricular septal defect also known as Taussig-Bing anomaly.
Further Findings and Autopsy
- The echocardiographic examination revealed other significant heart abnormalities, such as ventricular inversion with atrioventricular discordance, tricuspid valve atresia, a septum primum interatrial septal defect, mitral valve dysplasia with a cleft in the septal mitral valve cusp, and others.
- Further issues were found in the structure of the horse’s aorta and arteries.
- An autopsy was later conducted postmortem, which also revealed the same cardiac defects.
Conclusion
- The diagnoses, echocardiographic findings, and autopsy findings of the foal’s complex heart defects are presented and discussed in this paper.
- This study serves to deepen understanding and knowledge of such complex congenital cardiac malformations in equine species.
Cite This Article
APA
Kohnken R, Schober K, Godman J, Gardner A, Jenkins T, Schroeder E, Baker P, Dunbar L.
(2017).
Double outlet right ventricle with subpulmonary ventricular septal defect (Taussig-Bing anomaly) and other complex congenital cardiac malformations in an American Quarter Horse foal.
J Vet Cardiol, 20(1), 64-72.
https://doi.org/10.1016/j.jvc.2017.10.005 Publication
Researcher Affiliations
- Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, USA. Electronic address: Kohnken.1@osu.edu.
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, USA.
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, USA.
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, USA.
- Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, USA.
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, USA.
- Department of Laboratory Medicine and Anatomic Pathology, Nationwide Children's Hospital, Columbus, OH, USA.
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, USA.
MeSH Terms
- Animals
- Double Outlet Right Ventricle / diagnostic imaging
- Double Outlet Right Ventricle / pathology
- Double Outlet Right Ventricle / veterinary
- Echocardiography / veterinary
- Heart Defects, Congenital / diagnostic imaging
- Heart Defects, Congenital / pathology
- Heart Defects, Congenital / veterinary
- Heart Septal Defects, Ventricular / diagnostic imaging
- Heart Septal Defects, Ventricular / pathology
- Heart Septal Defects, Ventricular / veterinary
- Horses / abnormalities
- Male
Citations
This article has been cited 3 times.- Selecky ME, Louie EW, Donnelly C, Finno CJ, Morgan JM. Reference Values and Association of Body Weight, Age, and Sex With Echocardiographic Measurements in Non-Athletic Quarter Horses. J Vet Intern Med 2025 Sep-Oct;39(5):e70237.
- Kutara K, Kadekaru S, Hisaeda K, Sugimoto K, Ono T, Inoue Y, Nakamura S, Yoshitake R, Ohzawa E, Goto A, Iwata E, Shibano K, Une Y, Kitagawa H. Postmortem magnetic resonance imaging findings of tricuspid atresia with ventricular and atrial septal defects and subvalvular pulmonic stenosis in a Japanese native Noma horse. J Equine Sci 2023 Dec;34(4):121-125.
- Vitale V, Van Galen G, Laurberg M, Young B, Mciver V, Wereszka M, Gimeno M. Ascending aortic aneurysm associated with tetralogy of Fallot in an adult mare. Vet Med Sci 2021 Jan;7(1):9-15.
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