How is a persistent right aortic arch diagnosed?
In a dog that begins regurgitating shortly after weaning, this condition is suspected. Chest x-rays will confirm this, in particular a contrast study with barium which will show the dilated esophagus just ahead of the obstruction, located at the base of the heart. It is important to differentiate this condition from megaesophagus, which causes similar signs and in which the esophagus is dilated throughout its length.
