A heart murmur is an abnormal sound that a veterinarian hears when listening to a cat’s heart through a stethoscope. Normally, a veterinarian hears two sounds, a “lub” and a “dub,” which are the sounds of the heart valves closing as blood circulates through the heart. An additional “whooshing” sound, known as a heart murmur, is usually associated with a disturbance of the smooth blood flow through the heart.
Island Bird Cat & Dog Vet Group