Disorder - Persistent right aortic arch

Organ Systems Involved
Cardiovascular

Alternative disorders described within LIDA

Persistent left vena cava; Double aortic arch; Persistent truncus arteriosus; Persistent right subclavian artery; Persistent right ductus arteriosus; Persistent ligamentum arteriosum

Alternative Names
Persistent fourth right aortic arch; PRAA

Presenting Signs

A persistent right aortic arch occurs when there is abnormal development of the aorta (a large blood vessel arising from the heart) and its associated vessels. This results in these vessels entrapping the oesophagus (the tubular passage carrying food from the mouth to the stomach). Symptoms usually occur when kittens begin to eat solid foods at weaning, and arise because the oesophagus is constricted. The kitten will regurgitate food, and sometimes a bulge in the neck may be felt. Some kittens may also develop lung infections after food has been breathed into the lungs; this results in breathing difficulties and coughing. Some kittens may show also show stunted growth, weakness and emaciation due to malnutrition.

Treatment

Surgical and medical: definitive treatment requires surgical removal of the abnormal vessel, and dietary management following surgery.

PubMed References
Persistent right aortic arch

Contributor
Joyce Fong