A heart murmur is an abnormal sound that can be heard when a veterinarian listens to a dog's heart with a stethoscope.
Innocent heart murmurs are common in puppies and young dogs.
Pathological heart murmurs are caused by a problem with the heart, such as a valve defect, a hole in the heart, or cardiomyopathy.
Dogs with heart murmurs may not show any symptoms, but in some cases, they may experience fatigue, shortness of breath, coughing, or collapse.
The treatment for a heart murmur will depend on the cause and severity of the murmur. In some cases, no treatment is necessary.
The only way to detect a heart murmur is to have your dog's heart listened to by a veterinarian.