What is an innocent or physiologic heart murmur?
An innocent or physiologic heart murmur is a heart murmur that has no impact on the dog's health.
It is very common for young puppies, especially large breed puppies, to develop an innocent heart murmur while they are growing rapidly.
There are studies done saying up to 28% of puppies develop these murmurs.
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.
This type of murmur is benign (not harmful).
In general, a physiologic or innocent heart murmur will have a low intensity (usually Grade I-II out of VI) and does not cause any symptoms or clinical signs.
Heart murmurs are usually identified when a veterinarian uses a stethoscope to listen to your dog's heart.
We get the puppies hearts checked at their first vaccine.
If you ever have any concerns please phone your vet.
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