congenital lesions affecting the cardiac valves are discussed in
, Congenital heart disease.
Valvular heart disease is very common in
the dog, but much less so in the cat. Diseases of the valves may be congenital or
acquired. A summary of the primary diseases of the endocardium and valves is given
. Valves may also become involved secondarily
to other cardiac disease such as dilated cardiomyopathy or congenital shunts.