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  • #132849 Report Abuse
    Patricia A

    We have a almost 17 year old Chihuahua who was just diagnosed with enlarged heart. However vet explained that in small breeds it is very common to have Mitral Valve disease which she has. Symptoms with most only show up in later years. Her X-rays show the enlarge heart. My vet said there not all dogs diagnosed with DCM are caused by diet.
    What is Myxomatous or Degenerative Mitral Valve Disease?
    Canine myxomatous or degenerative mitral valve disease (MMVD) primarily affects older, small to medium size dogs, although any dog can be affected. Degenerative changes thicken the valve, causing it to leak. When the disease and leakage progress, the heart enlarges. Predisposed breeds include Cavalier King Charles Spaniels and Dachshunds and other breeds – although the genetics are being investigated, the disease is very common in small breed dogs as they age. Though many dogs are affected in their later years, only about 25-50% of those with MMVD experience clinical signs of congestive heart failure (CHF, or uid build-up within the lungs).

    #133534 Report Abuse
    Mary H

    You should try to refer it to your doctor.

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