Heart murmurs in these dogs may indicate that they have a disease called dilated cardiomyopathy (with a subsequent leaky mitral valve). Dilated cardiomyopathy is a disease of the pumping chamber (ventricle) of the heart where the muscle becomes weakened and the contraction of the heart is decreased.
How serious is a heart murmur in a puppy?
A heart murmur occurs when there is turbulent blood flow within the heart. Some murmurs, especially those found in young puppies, can be 'innocent' or 'physiologic' and will have no negative effects on your dog's health. Young puppies with innocent heart murmurs will usually outgrow them by about 5 months.
How long can a puppy live with a heart murmur?
Many dogs live a long time after being diagnosed with a heart murmur, and some can even live years after being diagnosed with heart failure. If you have any questions or concerns about murmurs, please contact your veterinarian.
Can a puppy survive a heart murmur?
The murmur may first appear at 6-8 weeks of age, and a puppy with an innocent heart murmur will usually outgrow it by about 4-5 months of age.
How serious is a heart murmur in a dog?
Heart murmurs sound serious, and often are, but sometimes a heart murmur is classified as an innocent heart murmur. These heart murmurs are not serious and often resolve with time. They are most commonly found in young dogs and are typically a grade III or less.
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