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 can be heard when the heart valves are not closing properly. It's usually caused by a leak in the heart valve. This can cause extra blood to flow through the heart, which can lead to a variety of symptoms, such as shortness of breath, chest pain, fatigue, and palpitations.