Unusual vascular ring anomaly associated with a persistent right aortic arch in two dogs

Journal of Small Animal Practice - Tập 46 Số 12 - Trang 585-590 - 2005
Arthur House1, Nuala Summerfield2, Alexander J. German2, P. J. W. Noble2, Patricia Ibarrola2, Daniel J. Brockman3
1Queen Mother Hospital, Royal Veterinary College, Hatfield.
2University of Liverpool Small Animal Hospital, Crown Street, Liverpool L7 7EX
3Queen Mother Hospital, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield AL9 7TA

Tóm tắt

An unusual vascular ring anomaly consisting of a persistent right aortic arch and a left ligamentum arteriosum extending from the main pulmonary artery to an aberrant left subclavian artery and left aortic arch remnant complex was identified in a German shepherd dog and a great Dane. The left subclavian artery and left aortic arch remnant complex originated at the junction between the right distal aortic arch and the descending aorta and coursed dorsal to the oesophagus in a cranial direction. The attachment of the ligamentum arteriosum to the aberrant left subclavian artery was approximately 5 cm cranial to the point of origin of the aberrant left subclavian artery and left aortic arch remnant complex from the descending aorta in both dogs. This anomaly observed in both dogs is similar to an anomaly reported in humans, in which a persistent right aortic arch is found in conjunction with an aberrant left subclavian artery and a left aortic arch remnant (Kommerell's diverticulum). Surgical ligation and division of the left ligamentum arteriosum in both dogs, along with division of the left subclavian artery in the great Dane, resulted in resolution of clinical signs in both of the dogs in this report.

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