Question

What is the second most common heart defect in dogs?

1) Aortic stenosis
2) Mitral valve disease
3) Patent ductus arteriosus
4) Pulmonic stenosis

Answer 1

Mitral valve disease is the second most common heart defect in dogs.

Step-by-step explanation:

The second most common heart defect in dogs is mitral valve disease. Mitral valve disease occurs when there is a malfunction or abnormality in the mitral valve, which is located between the left atrium and left ventricle of the heart.