[alaskayorkie]

My Lab Rusty had a heart murmur for years and lived to the ripe old age of 14 without it slowing him down.

It was complications from the heart murmur that led to his eventual passing, but that's still not a bad life span for a Lab.

Make sure you ask the vet what signs to look for that would indicate it's getting worse, and ask if there are any medications you can give him if the symptoms get bad. For my Lab, they told me he might wake up from naps coughing because fluid backs up in his lungs. He did a little bit of that starting at age 11 or so, but the turn for the worse came when the fluid started backing up in his body cavity and he started bloating.