Degenerative mitral valve disease is a common cause of congestive heart failure in dogs, especially small, older dogs.
退行性二尖瓣病变是引起犬只充血性心力衰竭的常见病因，尤其是小型犬和老年犬。
Degenerative mitral valve disease is a common cause of congestive heart failure in dogs, especially small, older dogs.
退行性二尖瓣病变是引起犬只充血性心力衰竭的常见病因，尤其是小型犬和老年犬。
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