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Other Cyanotic Heart Diseases in Animals

By

Sandra P. Tou

, DVM, DACVIM, North Carolina State University

Last full review/revision Jan 2020 | Content last modified Jan 2020

Patent ductus arteriosus, ventricular septal defect, and atrial septal defect with Eisenmenger syndrome are described elsewhere. Other cyanotic heart diseases, including truncus arteriosus, ventricular septal defect with pulmonary atresia, double-outlet right ventricle, and D-transposition of the great arteries, are rare in dogs and cats.

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Circulatory
In all animals, congenital heart defects can cause abnormal shunting of blood. Left-to-right shunts cause blood to be recirculated through the pulmonary vessels and can result in chamber dilatation. Right-to-left shunts cause blood to bypass the pulmonary vessels and can cause cyanosis. Which of the following conditions is most likely to result in a right-to-left heart shunt?
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