Mitral valve disease constitutes about 75% of heart diseases in dogs. The mitral valve is the heart's main pumping chamber. When it's not working properly, eventually this leads to congestive heart failure.
A large clinical trial evaluated effectiveness of using pimobendan to delay the onset of clinical signs of congestive heart failure in affected dogs.
The results seem promising.
Source article:
Treatment of Canine Mitral Valve Disease Shows Promise
Further reading:
Mitral Valve Disease in Dogs
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