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[[Image:dextra-aorta.jpg|right|thumb|125px|<small><center>'''Dextra-aorta'''. Courtesy of A. Jefferies</center></small>]]
[[Image:dextra-aorta.jpg|right|thumb|125px|<small><center>'''Dextra-aorta'''. Courtesy of A. Jefferies</center></small>]]
Most commonly found in dogs and cats. Acyanotic; clinical signs due to constriction of the [[Oesophagus - Anatomy & Physiology|oesophagus]]:
*Regurgiation of food, usually noticed at weaning.
*Aspiration pneumonia.
====Persistent Right Aortic Arch====
Most common vascular ring anomaly, increased incidence in GSDs, and Irish setters. vascular ring forms between the ductus arteriosus/ligamentum arteriosum and the persistent right aorta.
[[Megaoesophagus]] is seen cranial to the constriction.
Other causes include:
[[Image:dextra-aorta.jpg|right|thumb|200px|<small><center>'''Dextra-aorta'''. Courtesy of A. Jefferies</center></small>]]
====Double aortic arch====
====Anomalous subclavian arteries====
Arise form the aortic arch rather than the brachiocephalic artery.
''Diagnosis:''
*Ventral deviation of the trachea and dilation of the oesophagus on radiology.
*Barium swallow definitive.
''Treatment:''
*Surgical resection possible.
*Dietary management usually sufficient to control regurgitation.
*Seen most frequently in young animals right after weaning
*Seen most frequently in young animals right after weaning
-Less favourable if there is extensive esophageal damage
-Less favourable if there is extensive esophageal damage
[[Category:Cardiovascular_System_-_Developmental_Pathology]]