human
My doctor says I have a heart murmur, and I'm worried. What is a heart murmur?
assistant
A heart murmur is a sound that your doctor can hear when they listen to your heart. It’s caused by an extra blood flow through the heart valves. This extra blood flow can cause a murmur that sounds like a whooshing or a bubbling noise. The severity of the murmur depends on how much extra blood is flowing through the heart valves.