What does Stage 4 heart murmur in dogs mean?
Grade 4 – These murmurs are moderate to intense and can be heard on each side of the chest. Grade 5 – Very loud and can be heard even when the stethoscope is barely touching the chest. They can also be felt by holding a hand against the chest.
How long can a dog live with a severe 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.

Should I buy a puppy with a Grade 4 heart murmur?
If you have a new puppy or kitten: Loud heart murmurs (Grade 3-4/6 to 6/6) in a new puppy or kitty and soft heart murmurs that persist beyond 14-16 weeks of age should be evaluated by a cardiologist. This may indicate that congenital (present at birth) heart disease is present.
What is stage 4 heart failure in dogs?
Stage 4: CHF is in its final stage. Breathing becomes difficult even when at rest. Fluid can accumulate in various parts of the body, causing swollen legs or belly, making it difficult to walk. It can even cause vomiting.
How fast do heart murmurs progress in dogs?

It is very common for young puppies, especially large breed puppies, to develop an innocent heart murmur while they are growing rapidly. 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.
Can a puppy outgrow a Grade 4 heart murmur?
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 dog live with stage 4 heart failure?
Median survival time after diagnosis of advanced heart failure was 281 days (range, 3‐885 days).
Is it OK to walk a dog with a heart murmur?
When is a good time to exercise a dog with a heart murmur. Dogs with a heart murmur are usually intolerant of hot and humid days so take short walks very early in the day. You can use more mental exercise activities in the summer to help keep their mind stimulated, such as puzzle games.